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