Properties of the Square

Property 2

The four angles of the square are right.

Symbolic Representation

In the opposite figure,

∵ ABCD is a square

∴ m(∠A) = m(∠B) = m(∠C) = m(∠D) = 90°
 Please enable Java for an interactive construction (with Cinderella).
Drag free points A or B to realize that the four angles of the square are right.