1.
All right angles are ____________.
A.
congruent
B.
transitive
C.
180°
D.
complementary
Hint
2.
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
3.
If
and
are vertical angles and
and
find
A.
23
B.
68
C.
72
D.
43
Hint
4.
If
1 and
2 form a linear pair and m
1 = 2
x
+ 16 and
m
2 = 50
x
+ 60, find m
2.
A.
80
B.
180
C.
20
D.
160
Hint
5.
In the picture,
and
are vertical. If
then what is
A.
162
B.
28
C.
90
D.
81
Hint