EDGE Math 8

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Theorems on Angle Pairs

The next theorem states that all right angles have the same measure, which is 90°.

Theorem

Any two right angles are congruent.

Given:	$∠ A B C$ is a right angle.
	$∠ X Y Z$ is a right angle.
Prove:	$∠ A B C ≅ ∠ X Y Z$

Proof