Posts in category 'problem'
G.17 construct an equilateral triangle
Construct an equilateral triangle on a given segment.
G.20 transfer a segment to a point
Construct at a given point a segment equal to a given segment.
G.21 cut off an equal segment
Cut off from the greater of two unequal segments a segment equal to the less.
G.31 bisect an angle
Bisect a given angle.
G.32 bisect a segment
Bisect a given segment.
G.34 construct a perpendicular at a point on a line
Construct a segment at right angles to a given line from a given point on it.
G.35 construct a perpendicular from a point to a line
Construct a perpendicular to a given line from a given point not on it.
G.47 construct a triangle from three segments
Construct a triangle from three segments equal to three given segments satisfying the triangle inequality.
G.48 construct an angle equal to a given angle
Construct on a given line at a given point an angle equal to a given angle.
G.58 construct a line parallel to a given line
Construct through a given point a line parallel to a given line.
G.71 construct a parallelogram equal to a triangle
Construct, in a given angle, a parallelogram equal in area to a given triangle.
G.73 apply a parallelogram equal to a triangle on a segment
Apply to a given segment, in a given angle, a parallelogram equal in area to a given triangle.
G.74 construct a parallelogram equal to a polygon
Construct, in a given angle, a parallelogram equal in area to a given polygon.
G.75 construct a square on a segment
Construct a square on a given segment.
G.93 cut a segment in extreme and mean ratio
Cut a given segment so that the rectangle contained by the whole and one of the segments equals the square on the remaining segment.
G.97 construct a square equal to a polygon
Construct a square equal in area to a given rectilineal figure.
G.98 find the center of a circle
Find the center of a given circle.
G.119 draw a tangent to a circle from a point
From a given point, construct a line tangent to a given circle.
G.130 complete a circle from a given segment
Given a segment of a circle, complete the full circle of which it is a segment.
G.137 bisect an arc
Bisect a given arc of a circle.
G.141 construct a circle segment on a chord admitting a given angle
On a given segment, construct a segment of a circle admitting an angle equal to a given rectilineal angle.
G.142 cut off a circle segment admitting a given angle
From a given circle, cut off a segment admitting an angle equal to a given rectilineal angle.
G.149 inscribe a triangle in a circle equiangular with a triangle
Inscribe in a given circle a triangle equiangular with a given triangle.
G.151 circumscribe a triangle about a circle equiangular with a triangle
Circumscribe about a given circle a triangle equiangular with a given triangle.
G.154 inscribe a circle in a triangle
Inscribe a circle in a given triangle.
G.157 circumscribe a circle about a triangle
Circumscribe a circle about a given triangle.
G.158 inscribe a square in a circle
Inscribe a square in a given circle.
G.159 circumscribe a square about a circle
Circumscribe a square about a given circle.
G.160 inscribe a circle in a square
Inscribe a circle in a given square.
G.161 circumscribe a circle about a square
Circumscribe a circle about a given square.
G.162 construct a golden isosceles triangle
Construct an isosceles triangle having each of the angles at the base double the remaining angle.
G.163 inscribe a regular pentagon in a circle
Inscribe an equilateral and equiangular pentagon in a given circle.
G.164 circumscribe a regular pentagon about a circle
Circumscribe an equilateral and equiangular pentagon about a given circle.
G.165 inscribe a circle in a regular pentagon
Inscribe a circle in a given equilateral and equiangular pentagon.
G.166 circumscribe a circle about a regular pentagon
Circumscribe a circle about a given equilateral and equiangular pentagon.
G.167 inscribe a regular hexagon in a circle
Inscribe an equilateral and equiangular hexagon in a given circle.
G.168 inscribe a regular pentadecagon in a circle
Inscribe an equilateral and equiangular fifteen-angled figure in a given circle.
G.219 cut nth part
From a given segment to cut off a prescribed part.
G.220 cut similarly
Cut a given uncut segment similarly to a given cut segment.
G.221 third proportional
To two given segments to find a third proportional.
G.222 fourth proportional
To three given segments to find a fourth proportional.
G.223 mean proportional
To two given segments to find a mean proportional.
G.229 describe on a given segment a rectilinear figure
Describe on a given segment a rectilinear figure similar and similarly situated to a given rectilinear figure.
G.237 construct one and the same figure similar to
Construct one and the same figure similar to a given polygon and equal to another given polygon.
G.240 segment apply parallelogram
To a given segment to apply a parallelogram equal to a given polygon and deficient by a parallelogrammic figure similar to a given one: thus the given polygon must not be greater than the parallelogram described on the half of the segment and similar to the defect.
G.241 segment apply parallelogram
To a given segment to apply a parallelogram equal to a given polygon and exceeding by a parallelogrammic figure similar to a given one.
G.243 extreme and mean ratio
Cut a given segment in extreme and mean ratio.
G.251 numbers prime find
Given two numbers not prime to one another, to find their greatest common measure.
G.252 numbers prime find
Given three numbers not prime to one another, to find their greatest common measure.
G.289 many numbers please
Given as many numbers as we please, to find the least of those which have the same ratio with them.
G.290 numbers find least
Given two numbers, to find the least number which they measure.
G.292 numbers find least
Given three numbers, to find the least number which they measure.
G.295 find the number which is the least that
Find the number which is the least that will have given parts.
G.297 find numbers in continued proportion
Find numbers in continued proportion, as many as may be prescribed, and the least that are in a given ratio.
G.299 many ratios please
Given as many ratios as we please in least numbers, to find numbers in continued proportion which are the least in the given ratios.
G.348 numbers investigate whether
Given two numbers, to investigate whether it is possible to find a third proportional to them.
G.349 numbers investigate possible
Given three numbers, to investigate when it is possible to find a fourth proportional to them.
G.374 commensurable magnitudes find
Given two commensurable magnitudes, to find their greatest common measure.
G.375 commensurable magnitudes find
Given three commensurable magnitudes, to find their greatest common measure.
G.383 find two segments incommensurable
Find two segments incommensurable, the one in length only, and the other in square also, with an assigned segment.
G.401 find medial segments commensurable in square only which
Find medial segments commensurable in square only which contain a rational rectangle.
G.402 find medial segments commensurable in square only which
Find medial segments commensurable in square only which contain a medial rectangle.
G.403 find two rational segments commensurable in square only
Find two rational segments commensurable in square only and such that the square on the greater is greater than the square on the less by the square on a segment commensurable in length with the greater.
G.404 find two rational segments commensurable in square only
Find two rational segments commensurable in square only and such that the square on the greater is greater than the square on the less by the square on a segment incommensurable in length with the greater.
G.405 find two medial segments commensurable in square only
Find two medial segments commensurable in square only, containing a rational rectangle, and such that the square on the greater is greater than the square on the less by the square on a segment commensurable in length with the greater.
G.406 find two medial segments commensurable in square only
Find two medial segments commensurable in square only, containing a medial rectangle, and such that the square on the greater is greater than the square on the less by the square on a segment commensurable with the greater.
G.407 find two segments incommensurable in square which make
Find two segments incommensurable in square which make the sum of the squares on them rational but the rectangle contained by them medial.
G.408 find two segments incommensurable in square which make
Find two segments incommensurable in square which make the sum of the squares on them medial but the rectangle contained by them rational.
G.409 find two segments incommensurable in square which make
Find two segments incommensurable in square which make the sum of the squares on them medial and the rectangle contained by them medial and moreover incommensurable with the sum of the squares on them.
G.423 find the first binomial segment
Find the first binomial segment.
G.425 find the second binomial segment
Find the second binomial segment.
G.427 find the third binomial segment
Find the third binomial segment.
G.429 find the fourth binomial segment
Find the fourth binomial segment.
G.431 find the fifth binomial segment
Find the fifth binomial segment.
G.433 find the sixth binomial segment
Find the sixth binomial segment.
G.467 find the first apotome
Find the first apotome.
G.468 find the second apotome
Find the second apotome.
G.470 find the third apotome
Find the third apotome.
G.472 find the fourth apotome
Find the fourth apotome.
G.474 find the fifth apotome
Find the fifth apotome.
G.476 find the sixth apotome
Find the sixth apotome.
G.513 elevated point draw
From a given elevated point to draw a segment perpendicular to a given plane.
G.527 there plane angles
If there be three plane angles of which two, taken together in any manner, are greater than the remaining one, and they are contained by equal segments, it is possible to construct a triangle out of the segments joining the extremities of the equal segments.
G.528 construct a solid angle out of three plane
Construct a solid angle out of three plane angles two of which, taken together in any manner, are greater than the remaining one: thus the three angles must be less than four right angles.
G.532 segment point construct
On a given segment, and at a given point on it, to construct a solid angle equal to a given solid angle.
G.536 describe on a given segment a parallelepipedal solid
Describe on a given segment a parallelepipedal solid similar and similarly situated to a given parallelepipedal solid.
G.574 circles center inscribe
Given two circles about the same center, to inscribe in the greater circle an equilateral polygon with an even number of sides which does not touch the lesser circle.
G.577 spheres center inscribe
Given two spheres about the same center, to inscribe in the greater sphere a polyhedral solid which does not touch the lesser sphere at its surface.
G.592 construct pyramid comprehend
To construct a :term:`pyramid <G.553>`, to comprehend it in a given :term:`sphere <G.575>`, and to prove that the :term:`square <G.63>` on the :term:`diameter of the sphere <G.576>` is one and a half times the square on the side of the pyramid.
G.594 construct an octahedron and comprehend it in a
Construct an octahedron and comprehend it in a sphere, as in the preceding case; and to prove that the square on the diameter of the sphere is double of the square on the side of the octahedron.
G.595 construct a cube and comprehend it in a
Construct a cube and comprehend it in a sphere, like the pyramid; and to prove that the square on the diameter of the sphere is triple of the square on the side of the cube.
G.597 construct an icosahedron and comprehend it in a
Construct an icosahedron and comprehend it in a sphere, like the aforesaid figures; and to prove that the side of the icosahedron is the irrational segment called minor.
G.600 construct a dodecahedron and comprehend it in a
Construct a dodecahedron and comprehend it in a sphere, like the aforesaid figures, and to prove that the side of the dodecahedron is the irrational segment called apotome.
G.601 set out sides
To set out the sides of the five figures and to compare them with one another.