Properties of the Parallelogram

Property 1 Each two opposite angles of the parallelogram are equal in measure. Symbolic Representation In the opposite figure, ∵ ABCD is a parallelogram ∴ m(∠A) = m(∠C) and m(∠B) = m(∠D)	Please enable Java for an interactive construction (with Cinderella).
	Drag free points A, B, or C to realize that each two opposite angles of the parallelogram are equal in measure.