Shapes that has perpendicular lines

Hexagon has a lot of perpendicular line 

All right triangles are made from two perpendicular line segments. The corners of rectangles (and squares) are also made of perpendicular line segments. Two planes can also intersect at right angles, and then they are perpendicular planes. The sides of a cube are perpendicular planes. i am sure this is right.

C, e, and a (hope it )