In geometry, the angle bisector theorem is concerned with the relative lengths of the two segments that a triangle's side is divided into by a line that bisects the opposite angle. It equates their ...

This theorem ... angle bisector between two arms at 90 degrees (right angle) makes it easier to see how the inverse angles are complementary instead of complex-angled shapes like isosceles triangles.

You'll like draw a perfect square or rectangle by drawing congruent angles to form the box, and then congruent triangles (equilateral ... angles are congruent. This theorem dictates that ...