A Survey of Right Angles in Convex Pentagons

A regular pentagon, of course, has no right angles, but irregular pentagons can have one, two, or three (but not four, nor five). There are two varieties for both two and three right angles in pentagons -- the right angles can be consecutive, or non-consecutive.

will give 25 points!!!! please help!! Consider the marked interior

11, June, 2014

ABCDE is a regular pentagon. What will be the angle of ACD? - Quora

convex hull

truncation

Polygon - Definition, Properties, Types, Formulas

51-gon

compound

16, May, 2015