Posts tagged 'plane-at-right-angles-to-plane'
G.521 plane at right angles to a plane
A:term:**plane is at right angles to a plane** <plane-at-right-angles-to-plane> when the:term:segments <G.4> drawn, in one of the:term:planes <G.7>,:term:at right angles <G.33> to the common section of the planes are at right angles to the remaining plane.
G.522 segment right angles
If a segment be at right angles to any plane, all the planes through it is at right angles to the same plane.