1.	All right angles are ____________.
		A.	congruent	B.	180°
		C.	transitive	D.	complementary
		Hint
	2.	If and form a linear pair and find
		A.	96	B.	106
		C.	86	D.	76
		Hint
	3.	Which statement explains why
		A.	If two angles form a linear pair, then they are supplementary.
		B.	All right angles are congruent.
		C.	If the sum of the measures of two angles is 180, then they are supplementary.
		D.	Angles supplementary to the same angle are congruent.
		Hint
	4.	In the picture, and are vertical. If then what is
		A.	28	B.	162
		C.	81	D.	90
		Hint
	5.	If and form a linear pair and m = 72, find m.
		A.	18	B.	72
		C.	108	D.	144
		Hint