X427¶
COMPLEMENT OF X22
X427 (COMPLEMENT OF X22) constructed on acute reference triangle \((a, b, c) = (5, 6, 7)\) with unit baseline AB = \(1\).¶
Constructed Elements
Derived Triangle: Medial Triangle △MaMbMc — vertices Ma, Mb, Mc (Formed by the midpoints of sides BC, CA, AB)
Central Lines: {2, 22}, {2, 3} (Euler line)
Related Centers: X2 (CENTROID), X22 (EXETER POINT), X3 (CIRCUMCENTER)
Alternate Coordinates1 form
Barycentrics: \((a^{2} + b^{2} - c^{2}) \cdot (a^{2} - b^{2} + c^{2}) \cdot (b^{2} + c^{2}) : :\)
Linear Combinations1 combination
X427 lies on the cubics K517, K533, K539, K823, K836.
Incident Central Lines627 lines
{1, 5090}, {2, 3}, {6, 66}, {8, 11396}, {9, 21015}, {10, 1829}, {11, 33}, {12, 34}, {19, 3925}, {32, 47298}, {39, 12143}, {51, 125}, {52, 6746}, {53, 232}, {54, 31804}, {55, 11393}, {56, 11392}, {57, 1892}, {64, 14542}, {68, 36747}, {69, 12167}, {76, 8890}, {83, 11380}, {92, 2969}, {98, 275}, {107, 29011}, {110, 39884}, {112, 251}, {113, 12133}, {114, 136}, {115, 1196}, {116, 5185}, {119, 12138}, {120, 5521}, {122, 46831}, {126, 5139}, {127, 13166}, {135, 31842}, {137, 23319}, {141, 1843}, {143, 13561}, {154, 31383}, {155, 23307}, {182, 37649}, {183, 317}, {184, 1503}, {185, 3574}, {193, 8892}, {211, 27370}, {214, 12137}, {216, 26905}, {225, 26481}, {226, 1876}, {230, 571}, {238, 14975}, {242, 52412}, {262, 2052}, {264, 305}, {265, 15472}, {273, 7179}, {278, 1390}, {281, 1851}, {286, 37664}, {316, 33651}, {318, 3705}, {323, 3410}, {324, 2967}, {340, 37671}, {343, 511}, {371, 8280}, {372, 8281}, {373, 44079}, {385, 27377}, {388, 1398}, {389, 20299}, {393, 7736}, {394, 1352}, {395, 8739}, {396, 8740}, {459, 14484}, {485, 3093}, {486, 3092}, {487, 23309}, {488, 23310}, {495, 1870}, {496, 6198}, {497, 7071}, {498, 11398}, {499, 11399}, {515, 51707}, {524, 8541}, {542, 34986}, {578, 6146}, {590, 5412}, {597, 37875}, {608, 34261}, {615, 5413}, {618, 12142}, {619, 12141}, {625, 5140}, {629, 22482}, {630, 22481}, {641, 12148}, {642, 12147}, {648, 41624}, {748, 2212}, {750, 1395}, {804, 47230}, {899, 40976}, {908, 27409}, {930, 3563}, {940, 44105}, {946, 1902}, {958, 11391}, {973, 49108}, {1007, 19583}, {1031, 3329}, {1039, 1722}, {1086, 24163}, {1105, 14860}, {1125, 11363}, {1147, 12134}, {1172, 33854}, {1180, 5523}, {1181, 14216}, {1184, 3767}, {1194, 5254}, {1204, 6696}, {1209, 10625}, {1213, 44103}, {1217, 18855}, {1235, 3933}, {1241, 9230}, {1249, 37665}, {1291, 40118}, {1297, 20626}, {1329, 1828}, {1350, 43653}, {1351, 6515}, {1353, 1994}, {1369, 14929}, {1376, 11383}, {1401, 46152}, {1426, 15844}, {1447, 7282}, {1452, 24914}, {1474, 17398}, {1495, 10192}, {1506, 3199}, {1511, 12140}, {1568, 15030}, {1576, 39086}, {1611, 13881}, {1614, 16659}, {1627, 10312}, {1629, 14165}, {1698, 7713}, {1737, 1905}, {1753, 15908}, {1785, 24239}, {1799, 7750}, {1824, 1848}, {1826, 1841}, {1827, 21239}, {1838, 1867}, {1842, 30768}, {1865, 37661}, {1878, 3814}, {1890, 2355}, {1891, 25466}, {1897, 29840}, {1900, 25639}, {1916, 37892}, {1953, 21911}, {1968, 7745}, {1973, 29647}, {1974, 3589}, {1975, 34254}, {1986, 10264}, {1990, 9300}, {1992, 11405}, {1993, 3564}, {2023, 14715}, {2056, 11646}, {2183, 21912}, {2207, 2548}, {2211, 20965}, {2356, 3720}, {2453, 47177}, {2482, 12132}, {2486, 47232}, {2493, 34981}, {2501, 10278}, {2549, 15880}, {2550, 11406}, {2881, 47205}, {2883, 11381}, {2892, 32251}, {2904, 43588}, {2905, 17000}, {2971, 34336}, {2974, 34338}, {2979, 6403}, {3006, 41013}, {3011, 40950}, {3051, 20021}, {3054, 10985}, {3055, 14806}, {3060, 3580}, {3068, 5410}, {3069, 5411}, {3070, 11474}, {3071, 11473}, {3087, 7735}, {3096, 11386}, {3108, 41366}, {3167, 18440}, {3168, 51358}, {3172, 8879}, {3186, 3314}, {3192, 37662}, {3203, 27366}, {3258, 42426}, {3266, 44142}, {3291, 40326}, {3527, 45010}, {3567, 23294}, {3616, 7718}, {3618, 19118}, {3647, 16114}, {3703, 20883}, {3740, 41611}, {3757, 5174}, {3763, 7716}, {3796, 46264}, {3818, 9306}, {3819, 24206}, {3820, 29679}, {4383, 44086}, {4994, 8883}, {5012, 14389}, {5044, 41609}, {5081, 7081}, {5095, 8584}, {5097, 11225}, {5146, 29873}, {5155, 5268}, {5190, 5513}, {5203, 8770}, {5207, 37894}, {5249, 25365}, {5272, 7741}, {5275, 50036}, {5297, 10592}, {5304, 19041}, {5305, 5359}, {5306, 6103}, {5310, 6284}, {5318, 11476}, {5321, 11475}, {5322, 7354}, {5345, 10483}, {5422, 18583}, {5432, 52427}, {5446, 5449}, {5475, 9515}, {5490, 26373}, {5491, 26374}, {5552, 11400}, {5590, 11389}, {5591, 11388}, {5596, 19125}, {5599, 11384}, {5600, 11385}, {5640, 26913}, {5654, 18451}, {5690, 41722}, {5718, 44113}, {5743, 44092}, {5800, 44094}, {5889, 31802}, {5891, 51392}, {5913, 50718}, {5921, 15431}, {5943, 19130}, {5946, 52000}, {5966, 30248}, {5972, 16165}, {5996, 14618}, {6000, 18388}, {6033, 41253}, {6090, 14826}, {6108, 31687}, {6109, 31688}, {6114, 6117}, {6115, 6116}, {6152, 21230}, {6212, 16033}, {6213, 16027}, {6260, 12136}, {6288, 37495}, {6291, 23311}, {6292, 12144}, {6331, 8842}, {6340, 14248}, {6406, 23312}, {6467, 15583}, {6524, 10002}, {6525, 17830}, {6560, 18290}, {6561, 18289}, {6564, 8854}, {6565, 8855}, {6593, 32239}, {6697, 9969}, {6699, 15473}, {6759, 16655}, {6776, 11402}, {7009, 17923}, {7085, 50861}, {7292, 10593}, {7592, 11457}, {7603, 33842}, {7608, 39284}, {7649, 44316}, {7687, 32743}, {7699, 11455}, {7717, 18230}, {7722, 11804}, {7752, 47846}, {7753, 14581}, {7762, 8878}, {7774, 9308}, {7776, 40123}, {7778, 41762}, {7788, 44134}, {7789, 30747}, {7792, 36794}, {7840, 38294}, {8222, 11394}, {8223, 11395}, {8263, 11188}, {8428, 34866}, {8537, 41628}, {8550, 13366}, {8680, 25343}, {8753, 42008}, {8792, 41513}, {8796, 14494}, {8877, 10415}, {8968, 48467}, {8981, 10880}, {9134, 47236}, {9148, 17994}, {9157, 10735}, {9483, 42396}, {9544, 46818}, {9605, 41361}, {9732, 11091}, {9733, 11090}, {9744, 11547}, {9752, 35710}, {9766, 45921}, {9777, 11433}, {9781, 26917}, {9786, 26937}, {9792, 26954}, {9820, 10539}, {9833, 19357}, {9993, 43462}, {10110, 32767}, {10189, 41357}, {10190, 47627}, {10263, 34826}, {10282, 13419}, {10327, 17757}, {10516, 17811}, {10523, 15666}, {10527, 11401}, {10547, 16277}, {10550, 51862}, {10559, 51405}, {10576, 35764}, {10577, 35765}, {10601, 14561}, {10632, 42124}, {10633, 42121}, {10641, 23302}, {10642, 23303}, {10733, 32227}, {10881, 13966}, {10982, 39571}, {11174, 17907}, {11197, 44131}, {11206, 26864}, {11216, 47277}, {11408, 11488}, {11409, 11489}, {11411, 12160}, {11412, 33523}, {11424, 12241}, {11425, 19467}, {11430, 18400}, {11432, 18916}, {11435, 26957}, {11436, 26956}, {11438, 23329}, {11470, 15004}, {11472, 32123}, {11566, 40685}, {11572, 21659}, {11808, 14076}, {12022, 15033}, {12038, 45286}, {12058, 37511}, {12079, 35908}, {12139, 12864}, {12146, 13089}, {12161, 32140}, {12162, 18488}, {12165, 12317}, {12166, 12318}, {12168, 12319}, {12169, 12320}, {12170, 12321}, {12171, 12322}, {12172, 12323}, {12174, 12324}, {12175, 12325}, {12242, 14864}, {12295, 15432}, {12298, 45861}, {12299, 45860}, {12300, 20424}, {12618, 21062}, {12827, 14984}, {13007, 13025}, {13008, 13026}, {13051, 23313}, {13052, 23314}, {13148, 16003}, {13171, 13203}, {13292, 25738}, {13352, 18474}, {13367, 34782}, {13394, 29012}, {13403, 18383}, {13409, 23635}, {13428, 49029}, {13439, 49028}, {13562, 20806}, {13668, 13701}, {13788, 13821}, {13851, 23324}, {13857, 47354}, {14111, 35887}, {14156, 43586}, {14157, 16658}, {14376, 17407}, {14458, 43530}, {14492, 16080}, {14516, 34148}, {14583, 43090}, {14593, 40801}, {14627, 46443}, {14644, 43391}, {14767, 51412}, {14852, 44413}, {14918, 38429}, {14983, 45020}, {15038, 45967}, {15060, 51391}, {15066, 18358}, {15069, 37672}, {15116, 32246}, {15118, 41616}, {15152, 16252}, {15448, 44082}, {15449, 16102}, {15463, 32423}, {15484, 41370}, {15487, 46835}, {15523, 17442}, {15543, 15552}, {15544, 35605}, {15589, 32001}, {15819, 22480}, {16030, 19174}, {16188, 16221}, {16228, 47802}, {16229, 34964}, {16231, 39508}, {16276, 32819}, {16580, 40959}, {16607, 18636}, {16657, 18390}, {17451, 21717}, {17747, 24054}, {17810, 26958}, {17949, 32449}, {18287, 41925}, {18344, 21260}, {18356, 32358}, {18424, 24855}, {18475, 44407}, {18809, 46436}, {18853, 18854}, {18951, 37493}, {19119, 20079}, {19128, 38110}, {19347, 34780}, {19366, 26955}, {19404, 19420}, {19405, 19421}, {19446, 23298}, {19447, 23299}, {19459, 36851}, {19568, 47730}, {19724, 19755}, {19725, 19754}, {19784, 51686}, {19799, 19839}, {20185, 40120}, {20192, 45311}, {20306, 42448}, {20376, 52008}, {21072, 29016}, {21318, 41007}, {21637, 34774}, {21639, 23326}, {21663, 23328}, {21969, 41586}, {22240, 42459}, {22352, 44882}, {22483, 22966}, {22497, 22555}, {22750, 43614}, {22970, 23308}, {24321, 24686}, {26359, 26371}, {26360, 26372}, {26361, 26375}, {26362, 26376}, {26363, 26377}, {26364, 26378}, {26866, 26929}, {26867, 26939}, {26868, 26945}, {26892, 26932}, {26893, 26942}, {26894, 26950}, {26919, 26951}, {29667, 31419}, {30749, 40325}, {30786, 40413}, {31125, 41676}, {31127, 35360}, {31131, 44428}, {31406, 39575}, {31655, 48317}, {31670, 33586}, {31867, 35717}, {32000, 37668}, {32002, 37688}, {32046, 52432}, {32062, 51403}, {32085, 40425}, {32136, 45732}, {32184, 52003}, {32223, 48895}, {32240, 32255}, {32269, 48901}, {32332, 32391}, {32333, 32346}, {32337, 32341}, {32911, 44097}, {33547, 46686}, {34380, 45794}, {34417, 47296}, {34751, 44439}, {34781, 43841}, {34945, 41363}, {35540, 45211}, {35603, 36753}, {35718, 35729}, {35719, 35720}, {35723, 39565}, {35895, 35896}, {35971, 40377}, {36898, 38427}, {37472, 43595}, {37478, 44201}, {37650, 44100}, {37775, 42135}, {37776, 42138}, {38253, 43951}, {38396, 39879}, {38872, 44529}, {38970, 38975}, {39071, 47200}, {39511, 39533}, {39512, 51513}, {39532, 44432}, {39534, 48182}, {39662, 43448}, {39803, 39813}, {39832, 39842}, {39998, 44146}, {40149, 45964}, {40684, 44145}, {41171, 43574}, {41482, 51033}, {41603, 50649}, {41673, 41714}, {42353, 46832}, {42873, 51939}, {43817, 43823}, {44091, 51126}, {44426, 44429}, {45400, 45472}, {45401, 45473}, {45689, 47206}, {46147, 46151}, {46242, 46288}, {46261, 51425}, {47105, 51343}, {47392, 51385}
Functional Relations59 relations
X427 = midpoint of Xi and Xj for these {i,j}: {2, 31133}, {3, 31723}, {4, 378}, {22, 7391}, {112, 11605}, {184, 11550}, {1993, 11442}, {13352, 18474}, {15463, 44795}, {18570, 44288}, {24321, 24686}, {35480, 35481}
X427 = reflection of Xi in Xj for these {i,j}: {1, 51718}, {3, 52262}, {5, 39504}, {6, 51744}, {22, 6676}, {184, 23292}, {235, 45179}, {343, 21243}, {1843, 51994}, {7502, 140}, {12083, 16618}, {15760, 5}, {16102, 15449}, {16165, 5972}, {16387, 5159}, {16789, 141}, {18570, 44236}, {19127, 3589}, {25337, 3628}, {34177, 6697}, {37478, 44201}, {37969, 468}, {44210, 2}, {44218, 44287}, {44239, 3}, {44249, 18570}, {44259, 16238}, {44260, 6677}, {44261, 549}, {44262, 547}, {44263, 546}, {44285, 44218}, {46029, 13413}, {51692, 1125}
X427 = isogonal conjugate of X1176
X427 = isotomic conjugate of X1799
X427 = anticomplement of X6676
X427 = circumcircle-inverse of X21284
X427 = orthoptic-circle-of-the-Steiner-inellipse inverse of X186
X427 = 1st-Droz-Farney-circle-inverse of X45171
X427 = antitomic image of X16102
X427 = complement of the isotomic conjugate of X18018
X427 = isotomic conjugate of the complement of X8878
X427 = isotomic conjugate of the isogonal conjugate of X1843
X427 = isogonal conjugate of the isotomic conjugate of X1235
X427 = isotomic conjugate of the polar conjugate of X27376
X427 = Xi-complementary conjugate of Xj for these (i,j): {1, 206}, {2, 21247}, {6, 16582}, {31, 40938}, {57, 17068}, {66, 10}, {1289, 8062}, {2156, 2}, {2353, 37}, {13854, 226}, {14376, 18589}, {15388, 16599}, {16277, 1215}, {18018, 2887}, {40146, 16584}, {40421, 21235}, {43678, 20305}, {44766, 4369}, {46244, 626}
X427 = Xi-Ceva conjugate of Xj for these (i,j): {2, 40938}, {4, 1843}, {112, 523}, {264, 1235}, {1235, 141}, {6331, 2501}, {8791, 468}, {8889, 8893}, {16747, 20883}, {17171, 17442}, {27376, 41584}, {34129, 16318}, {46151, 826}
X427 = Xi-cross conjugate of Xj for these (i,j): {39, 141}, {141, 47730}, {826, 46151}, {1843, 27376}, {2530, 46152}, {3005, 35325}, {21016, 20883}, {23642, 76}, {23666, 75}, {42442, 6}, {46026, 4}, {46654, 31067}
X427 = Xi-isoconjugate of Xj for these (i,j): {1, 1176}, {3, 82}, {6, 34055}, {19, 28724}, {31, 1799}, {48, 83}, {63, 251}, {69, 46289}, {71, 52376}, {75, 10547}, {163, 4580}, {184, 3112}, {228, 52394}, {248, 3405}, {255, 32085}, {293, 51862}, {304, 46288}, {308, 9247}, {525, 34072}, {647, 4599}, {656, 827}, {810, 4577}, {822, 42396}, {905, 4628}, {906, 10566}, {1331, 18108}, {1437, 18082}, {1760, 46765}, {1790, 18098}, {2169, 17500}, {2172, 40404}, {2193, 18097}, {3049, 4593}, {4020, 52395}, {4574, 39179}, {4592, 18105}, {4630, 14208}, {10317, 37221}, {14575, 18833}, {18070, 32661}, {19611, 51508}, {22384, 36081}, {46104, 52430}
X427 = Xi-Dao conjugate of Xj for these (i,j): {2, 1799}, {2, 40938}, {3, 141}, {3, 1176}, {6, 28724}, {9, 34055}, {22, 427}, {25, 8793}, {39, 69}, {63, 40585}, {82, 36103}, {83, 1249}, {115, 4580}, {132, 51862}, {184, 34452}, {206, 10547}, {251, 3162}, {339, 3267}, {525, 15449}, {647, 3124}, {827, 40596}, {1194, 45201}, {1843, 15270}, {3405, 39039}, {3589, 7767}, {3933, 6665}, {3934, 22062}, {4577, 39062}, {4599, 39052}, {5139, 18105}, {5190, 10566}, {5521, 18108}, {6523, 32085}, {7664, 37804}, {8673, 47413}, {14363, 17500}, {18097, 47345}, {20775, 52042}, {21458, 50938}, {22105, 48317}, {23093, 44312}
X427 = cevapoint of Xi and Xj for these (i,j): {2, 8878}, {25, 8792}, {39, 1843}, {115, 2514}, {3005, 39691}, {28666, 46026}
X427 = crosspoint of Xi and Xj for these (i,j): {2, 18018}, {4, 264}, {16747, 17171}
X427 = crosssum of Xi and Xj for these (i,j): {3, 184}, {6, 206}, {25, 51509}, {251, 51508}
X427 = trilinear pole of line {826, 21108}
X427 = crossdifference of every pair of points on line {647, 8673}
X427 = X2-line conjugate of X44894
X427 = X4-Hirst inverse of X420
X427 = X55 of orthic triangle if ABC is acute
X427 = exsimilicenter of nine-point circle and incircle of orthic triangle if ABC is acute; the insimilicenter is X235
X427 = intersection of tangents to nine-point circle at PU(4)
X427 = pole of orthic axis wrt the nine-point circle
X427 = pole wrt polar circle of trilinear polar of X83 (line X23X385)
X427 = perspector of orthic and 5th Euler triangles
X427 = radical trace of anticomplementary circle and tangential circle
X427 = homothetic center of the medial triangle and the 2nd pedal triangle of X4
X427 = perspector of 4th Brocard triangle and cross-triangle of ABC and 4th Brocard triangle
X427 = perspector of ABC and cross-triangle of ABC and 5th Euler triangle
X427 = harmonic center of nine-point circle and circle O(PU(4))
X427 = intersection of tangents to Hatzipolakis-Lozada hyperbola at X4 and X6
X427 = excentral-to-ABC functional image of X56
X427 = intersection of tangents to Walsmith rectangular hyperbola at X113 and X125
X427 = barycentric product Xi*Xj for these {i,j}: {1, 20883}, {4, 141}, {6, 1235}, {10, 17171}, {19, 1930}, {25, 8024}, {27, 15523}, {37, 16747}, {38, 92}, {39, 264}, {69, 27376}, {75, 17442}, {76, 1843}, {86, 21016}, {95, 27371}, {107, 2525}, {112, 23285}, {190, 21108}, {193, 47730}, {273, 33299}, {278, 3703}, {281, 3665}, {286, 3954}, {297, 20021}, {324, 16030}, {331, 3688}, {343, 19174}, {393, 3933}, {420, 17949}, {468, 31125}, {523, 41676}, {525, 46151}, {648, 826}, {653, 48278}, {811, 8061}, {850, 35325}, {1289, 23881}, {1401, 7017}, {1502, 27369}, {1634, 14618}, {1783, 48084}, {1824, 16703}, {1826, 16887}, {1897, 16892}, {1964, 1969}, {2052, 3917}, {2501, 4576}, {2528, 42396}, {2530, 6335}, {2592, 46166}, {2593, 46167}, {2996, 41584}, {3005, 6331}, {3051, 18022}, {3186, 42551}, {3313, 43678}, {3404, 40703}, {3613, 37125}, {3867, 18840}, {4074, 37892}, {4391, 46152}, {4553, 17924}, {4568, 7649}, {5094, 23297}, {5117, 14617}, {5485, 41585}, {5523, 46165}, {6531, 51371}, {7794, 32085}, {7813, 17983}, {8041, 46104}, {8362, 8801}, {9019, 46105}, {9229, 12143}, {10159, 46026}, {14376, 41375}, {16080, 51360}, {16102, 40889}, {16696, 41013}, {17980, 35540}, {18018, 40938}, {18020, 39691}, {18027, 20775}, {19568, 47847}, {21035, 44129}, {28666, 40425}, {31613, 42394}, {35140, 51434}, {39129, 41361}, {40416, 46508}, {41331, 44161}, {44132, 51869}, {44146, 46154}, {44427, 46155}, {46106, 46147}, {46107, 46148}, {46108, 46149}, {46109, 46150}, {46110, 46153}
X427 = barycentric quotient Xi/Xj for these {i,j}: {1, 34055}, {2, 1799}, {3, 28724}, {4, 83}, {6, 1176}, {19, 82}, {25, 251}, {27, 52394}, {28, 52376}, {32, 10547}, {38, 63}, {39, 3}, {53, 17500}, {66, 40404}, {92, 3112}, {107, 42396}, {112, 827}, {141, 69}, {162, 4599}, {225, 18097}, {232, 51862}, {240, 3405}, {264, 308}, {275, 39287}, {276, 41488}, {297, 20022}, {393, 32085}, {420, 40850}, {429, 27067}, {523, 4580}, {648, 4577}, {688, 3049}, {732, 12215}, {811, 4593}, {826, 525}, {1235, 76}, {1401, 222}, {1593, 26224}, {1634, 4558}, {1824, 18098}, {1826, 18082}, {1840, 18099}, {1843, 6}, {1883, 27005}, {1923, 9247}, {1930, 304}, {1964, 48}, {1969, 18833}, {1973, 46289}, {1974, 46288}, {2052, 46104}, {2084, 810}, {2353, 46765}, {2489, 18105}, {2525, 3265}, {2528, 2525}, {2530, 905}, {2971, 51906}, {3005, 647}, {3051, 184}, {3118, 4173}, {3162, 8793}, {3172, 51508}, {3313, 20806}, {3404, 293}, {3575, 10548}, {3665, 348}, {3688, 219}, {3703, 345}, {3787, 3167}, {3867, 3618}, {3914, 18084}, {3917, 394}, {3933, 3926}, {3954, 72}, {4020, 255}, {4074, 37894}, {4553, 1332}, {4568, 4561}, {4576, 4563}, {5064, 39668}, {5094, 10130}, {6292, 7767}, {6331, 689}, {6591, 18108}, {6995, 42037}, {7649, 10566}, {7794, 3933}, {7813, 6390}, {8024, 305}, {8041, 3917}, {8061, 656}, {8362, 3785}, {8711, 22159}, {8735, 18101}, {8750, 4628}, {8754, 34294}, {8791, 9076}, {9019, 22151}, {11105, 29534}, {11205, 22352}, {11325, 38834}, {12143, 384}, {13854, 16277}, {14273, 22105}, {14424, 14417}, {15523, 306}, {16030, 97}, {16318, 21458}, {16696, 1444}, {16747, 274}, {16887, 17206}, {16892, 4025}, {16893, 4121}, {17171, 86}, {17187, 1790}, {17407, 40357}, {17442, 1}, {17980, 733}, {18022, 40016}, {19118, 33632}, {19174, 275}, {19577, 51459}, {19595, 5596}, {19606, 15389}, {20021, 287}, {20775, 577}, {20883, 75}, {21016, 10}, {21035, 71}, {21108, 514}, {21123, 1459}, {21248, 45201}, {21336, 45220}, {21814, 228}, {23208, 10316}, {23285, 3267}, {23642, 11574}, {24006, 18070}, {27369, 32}, {27370, 41334}, {27371, 5}, {27373, 8743}, {27374, 217}, {27376, 4}, {28666, 6292}, {28667, 8788}, {29959, 41614}, {30489, 43697}, {31125, 30786}, {31390, 21637}, {32085, 52395}, {32676, 34072}, {33299, 78}, {35319, 23181}, {35325, 110}, {36794, 41296}, {37125, 1078}, {39284, 39289}, {39691, 125}, {40889, 16095}, {40936, 22061}, {40938, 22}, {40972, 212}, {41267, 2200}, {41272, 14908}, {41331, 14575}, {41375, 17907}, {41584, 193}, {41585, 1992}, {41676, 99}, {42551, 43714}, {44090, 46228}, {45211, 45210}, {46026, 3589}, {46147, 14919}, {46148, 1331}, {46149, 1814}, {46150, 1797}, {46151, 648}, {46152, 651}, {46153, 1813}, {46154, 895}, {46166, 8115}, {46167, 8116}, {46387, 22384}, {46508, 626}, {46509, 8023}, {47730, 2996}, {48084, 15413}, {48278, 6332}, {50521, 22383}, {51360, 11064}, {51371, 6393}, {51434, 1503}, {51869, 248}
X427 = {Xi,Xj}-harmonic conjugate of Xk for these (i,j,k): {1, 5090, 12135}, {2, 3, 7499}, {2, 4, 25}, {2, 5, 37439}, {2, 20, 7494}, {2, 22, 6676}, {2, 25, 468}, {2, 468, 52297}, {2, 858, 1368}, {2, 1368, 30739}, {2, 1370, 3}, {2, 1995, 6677}, {2, 3091, 7392}, {2, 3146, 10565}, {2, 3830, 37904}, {2, 3832, 7398}, {2, 4232, 38282}, {2, 5064, 428}, {2, 5133, 5}, {2, 5169, 5133}, {2, 5189, 6636}, {2, 6353, 37453}, {2, 6636, 7495}, {2, 6995, 6353}, {2, 6997, 5020}, {2, 7378, 4}, {2, 7386, 7484}, {2, 7391, 22}, {2, 7392, 11284}, {2, 7394, 1995}, {2, 7396, 7386}, {2, 7398, 40132}, {2, 7408, 4232}, {2, 7409, 6995}, {2, 7485, 140}, {2, 7500, 7493}, {2, 7571, 3628}, {2, 8889, 5094}, {2, 14957, 7467}, {2, 16051, 31255}, {2, 16063, 7485}, {2, 16951, 7807}, {2, 24584, 1375}, {2, 26032, 37099}, {2, 26096, 25494}, {2, 26760, 27028}, {2, 26808, 26967}, {2, 28684, 28664}, {2, 30744, 5159}, {2, 30888, 46531}, {2, 30951, 37370}, {2, 31021, 857}, {2, 31074, 858}, {2, 31099, 1370}, {2, 31105, 31133}, {2, 31152, 43957}, {2, 31857, 31074}, {2, 34603, 10154}, {2, 34609, 7667}, {2, 37174, 37187}, {2, 37349, 13595}, {2, 37353, 37990}, {2, 37362, 37432}, {2, 37456, 4224}, {2, 37913, 52300}, {2, 38282, 52292}, {2, 46336, 16419}, {2, 47314, 8703}, {2, 52284, 8889}, {2, 52285, 10301}, {2, 52299, 52298}, {3, 4, 3575}, {3, 5, 7399}, {3, 25, 21213}, {3, 381, 18420}, {3, 1370, 7667}, {3, 5576, 5}, {3, 18494, 18533}, {3, 18533, 37931}, {3, 31099, 46517}, {3, 34609, 1370}, {3, 44441, 47090}, {4, 5, 235}, {4, 20, 12173}, {4, 24, 6756}, {4, 25, 428}, {4, 28, 37398}, {4, 186, 7576}, {4, 235, 1906}, {4, 381, 10151}, {4, 403, 1596}, {4, 406, 4186}, {4, 429, 1904}, {4, 442, 37376}, {4, 451, 4222}, {4, 458, 460}, {4, 468, 10301}, {4, 469, 430}, {4, 470, 462}, {4, 471, 463}, {4, 475, 4185}, {4, 631, 7487}, {4, 860, 1894}, {4, 1346, 1312}, {4, 1347, 1313}, {4, 1585, 52286}, {4, 1586, 52287}, {4, 1593, 1885}, {4, 1594, 5}, {4, 1595, 1907}, {4, 2476, 431}, {4, 3088, 1593}, {4, 3089, 5198}, {4, 3090, 3089}, {4, 3091, 37197}, {4, 3127, 32588}, {4, 3128, 32587}, {4, 3144, 37390}, {4, 3147, 37122}, {4, 3520, 6240}, {4, 3535, 52291}, {4, 3536, 5200}, {4, 3541, 3}, {4, 3542, 1598}, {4, 3545, 6623}, {4, 4194, 17516}, {4, 4196, 1889}, {4, 4200, 4214}, {4, 4212, 27}, {4, 4213, 14004}, {4, 5064, 52285}, {4, 5094, 468}, {4, 5117, 297}, {4, 5125, 407}, {4, 5136, 1884}, {4, 5142, 429}, {4, 5169, 37981}, {4, 6143, 3518}, {4, 6353, 6995}, {4, 7378, 5064}, {4, 7498, 28076}, {4, 7505, 10594}, {4, 7507, 23047}, {4, 7547, 546}, {4, 7577, 403}, {4, 7714, 7408}, {4, 8889, 2}, {4, 10018, 7715}, {4, 11109, 37226}, {4, 14865, 18560}, {4, 14940, 34484}, {4, 15559, 1595}, {4, 18533, 18494}, {4, 18560, 3627}, {4, 26020, 37432}, {4, 30100, 12225}, {4, 35473, 18559}, {4, 35475, 34797}, {4, 35481, 35480}, {4, 35482, 3520}, {4, 35488, 44226}, {4, 35490, 3853}, {4, 35502, 13488}, {4, 37074, 1529}, {4, 37117, 7511}, {4, 37118, 37458}, {4, 37119, 24}, {4, 37125, 27369}, {4, 37337, 11325}, {4, 37388, 37385}, {4, 37943, 52294}, {4, 38282, 7714}, {4, 44287, 44281}, {4, 44438, 13473}, {4, 44958, 44803}, {4, 52249, 52280}, {4, 52252, 28}, {4, 52280, 6755}, {4, 52284, 5094}, {4, 52288, 6620}, {4, 52290, 52301}, {4, 52295, 1594}, {4, 52296, 21841}, {4, 52299, 6353}, {5, 140, 7405}, {5, 858, 30739}, {5, 1368, 2}, {5, 1595, 4}, {5, 1596, 403}, {5, 1906, 45004}, {5, 1907, 1906}, {5, 3627, 15761}, {5, 3845, 46030}, {5, 6823, 13160}, {5, 13371, 11585}, {5, 15559, 1907}, {5, 15687, 11563}, {5, 15809, 25}, {5, 23335, 3}, {5, 44960, 16868}, {6, 66, 26926}, {6, 1853, 1899}, {6, 1899, 11245}, {20, 13160, 6823}, {22, 6676, 44210}, {22, 31133, 7391}, {22, 31236, 2}, {22, 37353, 46029}, {24, 37119, 140}, {25, 428, 10301}, {25, 5064, 4}, {25, 5094, 2}, {25, 7378, 52285}, {25, 37453, 6353}, {25, 52298, 37453}, {33, 5101, 1862}, {39, 27371, 27376}, {51, 125, 13567}, {53, 3815, 232}, {54, 34224, 31804}, {115, 1560, 44467}, {125, 132, 47202}, {140, 6756, 24}, {140, 10691, 7485}, {140, 11548, 2}, {140, 16198, 6756}, {140, 47315, 16063}, {140, 50138, 5}, {141, 1843, 41584}, {141, 3867, 1843}, {154, 36990, 31383}, {185, 3574, 12233}, {186, 7576, 37458}, {186, 37118, 549}, {230, 6748, 10311}, {235, 1907, 4}, {235, 30739, 468}, {235, 44960, 44995}, {235, 45003, 44996}, {264, 18022, 42394}, {264, 51843, 18022}, {275, 23295, 8901}, {343, 45303, 21243}, {378, 35480, 35481}, {378, 37970, 3520}, {378, 44269, 18570}, {378, 44274, 44281}, {378, 45179, 15760}, {381, 1597, 4}, {381, 2072, 5}, {381, 5020, 6997}, {381, 30771, 5020}, {382, 7493, 37899}, {382, 9909, 7500}, {393, 7736, 45141}, {403, 1594, 7577}, {403, 1596, 235}, {403, 7577, 5}, {428, 468, 25}, {428, 5094, 52297}, {428, 8889, 52293}, {428, 52285, 4}, {429, 1883, 4}, {442, 8226, 7522}, {465, 41034, 3132}, {466, 41035, 3131}, {468, 5094, 52293}, {468, 52285, 428}, {470, 471, 52289}, {470, 472, 16250}, {471, 473, 16249}, {472, 473, 52281}, {546, 5159, 1995}, {546, 10224, 5}, {546, 13488, 4}, {549, 37458, 186}, {578, 18381, 6146}, {590, 5412, 13884}, {615, 5413, 13937}, {631, 7487, 3515}, {631, 44831, 44837}, {858, 1594, 5094}, {858, 2072, 47097}, {858, 5133, 2}, {858, 5169, 5}, {858, 5576, 37454}, {858, 7378, 15809}, {858, 31099, 23335}, {858, 37981, 468}, {858, 46698, 1312}, {858, 46699, 1313}, {867, 37354, 8727}, {1113, 1114, 21284}, {1125, 49542, 11363}, {1204, 6696, 43903}, {1312, 1313, 468}, {1346, 1347, 5094}, {1346, 46699, 5}, {1347, 46698, 5}, {1368, 1595, 15809}, {1368, 5133, 37439}, {1370, 31099, 34609}, {1370, 34609, 46517}, {1513, 52280, 25}, {1585, 1586, 458}, {1593, 7507, 4}, {1593, 18386, 44438}, {1594, 1595, 235}, {1594, 15559, 4}, {1594, 15809, 37439}, {1595, 52284, 30739}, {1596, 16868, 45000}, {1597, 52284, 47097}, {1598, 1656, 3542}, {1656, 16419, 2}, {1656, 50137, 5}, {1799, 16275, 7750}, {1843, 46026, 3867}, {1848, 1861, 1824}, {1883, 5142, 1904}, {1885, 13473, 44438}, {1885, 23047, 4}, {1907, 37439, 428}, {1994, 3448, 45968}, {1994, 45968, 1353}, {1995, 30744, 2}, {2041, 2042, 9715}, {2052, 6530, 14569}, {2071, 38323, 44241}, {2450, 37988, 5}, {2476, 37983, 5}, {2479, 2480, 40889}, {2969, 7140, 92}, {2979, 37636, 48876}, {3060, 3580, 41588}, {3060, 7703, 23293}, {3060, 23293, 3580}, {3088, 7507, 1885}, {3091, 16051, 11284}, {3091, 37197, 10019}, {3127, 3128, 4}, {3146, 10565, 34608}, {3147, 37122, 3517}, {3148, 14003, 441}, {3153, 7527, 52069}, {3162, 13854, 16318}, {3258, 42426, 47223}, {3516, 12173, 20}, {3517, 3526, 3147}, {3518, 6143, 10018}, {3518, 7496, 37920}, {3520, 6240, 550}, {3547, 34938, 11414}, {3548, 7528, 6642}, {3567, 23294, 26879}, {3575, 7499, 21213}, {3575, 37454, 468}, {3575, 37931, 18533}, {3627, 45177, 235}, {3628, 10300, 40916}, {3628, 21841, 7505}, {3628, 50136, 5}, {3830, 7579, 10254}, {3830, 10254, 11799}, {3832, 30769, 40132}, {3839, 30775, 47597}, {3850, 44226, 35488}, {3850, 49673, 5}, {3851, 50143, 5}, {3853, 37897, 7519}, {4074, 40379, 141}, {4232, 7408, 7714}, {4232, 7714, 25}, {4232, 52292, 468}, {5000, 5001, 5}, {5002, 5003, 12225}, {5004, 5005, 7488}, {5020, 30771, 2}, {5055, 50135, 5}, {5064, 5094, 25}, {5064, 8889, 468}, {5064, 37439, 1906}, {5064, 52292, 7408}, {5064, 52298, 6995}, {5066, 50140, 5}, {5072, 50139, 5}, {5094, 7378, 428}, {5094, 37197, 11284}, {5094, 37453, 52298}, {5094, 37920, 6143}, {5094, 37981, 5}, {5094, 52298, 52299}, {5133, 15559, 5064}, {5133, 15809, 235}, {5133, 31074, 1368}, {5133, 37990, 37353}, {5159, 6677, 2}, {5169, 31074, 2}, {5169, 31101, 37353}, {5169, 31857, 858}, {5169, 40916, 50136}, {5169, 46336, 50137}, {5169, 52284, 1594}, {5189, 6636, 52397}, {5189, 7495, 550}, {5422, 18911, 45298}, {5446, 5449, 41587}, {5480, 13567, 51}, {5480, 23332, 13567}, {5576, 23335, 7399}, {6143, 10018, 632}, {6240, 7495, 21284}, {6247, 12233, 185}, {6353, 6995, 25}, {6353, 7577, 37990}, {6353, 8889, 52299}, {6353, 35481, 22}, {6353, 37453, 468}, {6353, 52299, 2}, {6623, 32216, 468}, {6636, 52397, 550}, {6639, 7517, 13383}, {6640, 7506, 16238}, {6640, 44259, 44907}, {6643, 7404, 7395}, {6644, 18281, 10257}, {6676, 13413, 37990}, {6696, 13568, 1204}, {6747, 42400, 53}, {6756, 16198, 4}, {6776, 11427, 11402}, {6995, 7378, 7409}, {6995, 7391, 35480}, {6995, 7409, 4}, {6995, 8889, 52298}, {6995, 37353, 403}, {6995, 52298, 468}, {6995, 52299, 37453}, {7378, 8889, 25}, {7378, 15809, 1907}, {7378, 52284, 2}, {7386, 7396, 31152}, {7386, 7484, 43957}, {7386, 28412, 426}, {7391, 31236, 6676}, {7392, 11403, 428}, {7392, 16051, 2}, {7394, 30744, 6677}, {7396, 7539, 43957}, {7398, 30769, 2}, {7400, 52398, 37198}, {7403, 11585, 5}, {7408, 38282, 25}, {7409, 8889, 37453}, {7409, 37453, 428}, {7409, 37990, 1596}, {7409, 52284, 52299}, {7409, 52299, 25}, {7418, 46591, 21284}, {7484, 7539, 2}, {7484, 31152, 7386}, {7485, 16063, 10691}, {7493, 7500, 9909}, {7494, 44442, 20}, {7495, 52397, 6636}, {7499, 7667, 3}, {7499, 37454, 2}, {7499, 46517, 7667}, {7500, 9909, 37899}, {7503, 37444, 12362}, {7505, 10594, 21841}, {7505, 52296, 3628}, {7507, 44438, 18386}, {7514, 31181, 14791}, {7526, 18569, 12605}, {7530, 10201, 37971}, {7536, 49132, 199}, {7539, 31152, 7484}, {7542, 7553, 26}, {7544, 17928, 9825}, {7547, 35502, 4}, {7558, 10323, 16197}, {7566, 17928, 7544}, {7569, 10323, 7558}, {7570, 37977, 14940}, {7571, 40916, 2}, {7576, 37118, 186}, {7577, 18533, 37347}, {7577, 31101, 52298}, {7577, 35480, 46029}, {7579, 11799, 5}, {7592, 11457, 18914}, {7667, 37454, 7499}, {7667, 46517, 1370}, {7714, 38282, 4232}, {8370, 35920, 15014}, {8889, 15559, 15809}, {8889, 15809, 30739}, {8889, 52285, 52297}, {8891, 21248, 141}, {9777, 26869, 11433}, {9786, 40686, 26937}, {9818, 18531, 34664}, {9825, 16196, 17928}, {9909, 18364, 6636}, {10109, 50134, 5}, {10151, 47097, 468}, {10295, 35473, 8703}, {10301, 52293, 468}, {10594, 52296, 7505}, {10691, 11548, 140}, {11056, 16275, 1799}, {11284, 31255, 2}, {11381, 43831, 2883}, {11403, 37197, 4}, {11410, 37196, 376}, {11427, 32064, 6776}, {11432, 26944, 18916}, {11433, 14853, 9777}, {11433, 23291, 26869}, {11548, 47315, 10691}, {11572, 21659, 41362}, {11737, 50142, 5}, {11818, 18281, 6644}, {12086, 34007, 52071}, {12100, 37934, 35472}, {12106, 44452, 44211}, {13371, 33332, 7403}, {13413, 46029, 5}, {13490, 44452, 12106}, {13567, 23332, 125}, {14130, 31724, 18563}, {14782, 14783, 7401}, {14784, 14785, 3547}, {14813, 14814, 34002}, {14826, 37669, 6090}, {14853, 23291, 11433}, {15033, 25739, 12022}, {15559, 52295, 5}, {16051, 37197, 468}, {16238, 32144, 6640}, {16252, 16621, 26883}, {16387, 44260, 44210}, {17111, 23304, 11}, {18386, 44438, 4}, {18420, 44441, 3}, {18494, 18533, 3575}, {18559, 35473, 10295}, {18560, 45177, 15761}, {18570, 44236, 44218}, {18570, 44249, 44285}, {18570, 44269, 44281}, {18570, 44274, 44269}, {18570, 44287, 44236}, {18583, 45298, 5422}, {19041, 19042, 40065}, {21213, 37454, 52297}, {21850, 41588, 3060}, {23336, 31830, 37814}, {24886, 24939, 2}, {25738, 36749, 13292}, {25985, 26020, 2}, {25985, 37362, 25}, {27098, 27150, 2}, {27386, 27510, 33305}, {28020, 28084, 33302}, {28048, 28126, 33306}, {28240, 28354, 859}, {28412, 28701, 441}, {29385, 29442, 46497}, {29498, 29701, 46575}, {29553, 29752, 46574}, {29970, 30040, 46514}, {30739, 37439, 2}, {31074, 37353, 31101}, {31099, 52284, 3541}, {31101, 37353, 2}, {31105, 52284, 378}, {31133, 31236, 22}, {31236, 35480, 37453}, {31670, 37638, 47582}, {31723, 52262, 44239}, {32587, 32588, 4}, {34221, 34222, 19161}, {34797, 35475, 35491}, {34797, 35491, 15704}, {35471, 35477, 548}, {35480, 52299, 6676}, {35487, 44803, 44958}, {35502, 52295, 10224}, {37353, 37990, 5}, {37452, 50137, 1656}, {37453, 52298, 2}, {37454, 46517, 3}, {37472, 44076, 43595}, {39504, 46029, 13413}, {42789, 42790, 35921}, {43957, 47311, 31152}, {44218, 44249, 18570}, {44236, 44288, 44249}, {44287, 44288, 18570}, {44637, 44638, 6748}, {44996, 45003, 45006}, {46517, 47097, 47090}, {46698, 46699, 37981}, {47090, 47310, 47340}, {47612, 47613, 11585}, {52286, 52287, 460}, {52293, 52297, 2}
Notes¶
As a point on the Euler line, X427 has Shinagawa coefficients \((F,E + F)\).
Let LA be the line tangent to the nine-point circle at the midpoint of segment BC, and define LB and LC cyclically. The triangle formed by the lines LA, LB, LC is homothetic to the orthic triangle, and the center of homothety is X427. (Randy Hutson, 9/23/2011)
Let (O) be the circumcircle, (N) the nine-point circle, and (IA, (IB, (IC the excircles of ABC. Let A' and A″ be the points of intersection of (O) and (IA. Let FA be the touchpoint of (N) and (IA, and let (KA) be the circle through A' and A″ that is internally tangent to (N); let LA be the touchpoint. Define FB, FC and LB, LC cyclically. The lines FALA, FBLB, FCLC concur ion X427. (Tran Quang Hung ADGEOM #1458, August 5, 2014; see also #1459)
Let CmaCmbCmc be the circummedial triangle. Let A″ be the pole, wrt the polar circle, of line CmbCmc, and define B″ and C″ cyclically. The lines AA″, BB″, CC″ concur in X427. Moreover, X427 is the Euler line intercept of radical axis of nine-point circle and every circle with center on orthic axis that is orthogonal to nine-point circle, and X427 is the point in which the extended trapezoid legs (P(4),P(4)-Ceva conjugate of U(4)) and (U(4),U(4)-Ceva conjugate of P(4)) meet. Also, X427 is the QA-P38 center (Montesdeoca-Hutson Point) of quadrangle ABCX2. (Randy Hutson, October 13, 2015)
X427 is the homothetic center of any pair of the following: polar triangle of nine-point circle, orthic axes triangle (see X2501), Yiu tangents triangle (see X7495). (Randy Hutson, August 19, 2019)