1.	All right angles are ____________.
		A.	transitive	B.	complementary
		C.	180°	D.	congruent
		Hint
	2.	If and form a linear pair and find
		A.	96	B.	86
		C.	76	D.	106
		Hint
	3.	Which statement explains why
		A.	All right angles are congruent.
		B.	Angles adjacent to the same angle or to congruent angles are congruent.
		C.	Angles complementary to the same angle or to congruent angles are congruent.
		D.	Vertical angles are congruent.
		Hint
	4.	Which statement explains why
		A.	All right angles are congruent.
		B.	Angles supplementary to the same angle are congruent.
		C.	If the sum of the measures of two angles is 180, then they are supplementary.
		D.	If two angles form a linear pair, then they are supplementary.
		Hint
	5.	In the picture, and are vertical. If then what is
		A.	28	B.	90
		C.	162	D.	81
		Hint