Properties of the Rectangle

Property 1 The four angles of the rectangle are right. Symbolic Representation In the opposite figure, ∵ ABCD is a rectangle ∴ m(∠A) = m(∠B) = m(∠C) = m(∠D) = 90°	Please enable Java for an interactive construction (with Cinderella).
	Drag free points A and B, or semi free point C to realize that the four angles of the rectangle are right.