1. Identify each of the following angle measures as acute, right, obtuse, straight, or reflex.

1. Identify each of the following angle measures as acute, right, obtuse, straight, or reflex.
a) 35° 91° 650 280
b) 164° 1810 2050 610
c) 193° 240 380 1800
d) 90° 1790 1010 320
e) 45° 930 810 940
f) 68° 570 490 210
g) 359° 930 310 190
2. Identify the following as adjacent, complementary, supplementary, linear pairs, or vertical
angles. Some angles may have more than one characteristic. Justify, or prove, youranswers. In other words, if you state that two angles are supplementary, then the proof is
because their sums equal 1800.
3. Why do complementary or supplementary angles not have to be adjacent? Why are
vertical angles always congruent? Justify your answers.
4. Find the measures of the following complementary angles.
78°
a. b. c.
d. e. f.
C
A B
D
A
B
D
b
B Cd
A D
H E
G F
Angle A Angle B.
64° ?
36° ?
42° ?
51° ?
68° ?
5. Find the measures of the following supplementary angles.
If Angle A measures The Angle B measures
126° ?
132° ?
178° ?
45° ?
89° ?