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Worksheets

Interior / Exterior Angles of Triangles

Total questions: 25

Worksheet time: 2hrs 5mins

Name
Class
Date
1.
The Triangle Sum Theorem states that the sum of all angles in a triangle is ______. 
a)
45°
b)
90°
c)
180°
d)
360°
2.

A student is trying to construct triangles using four different sets of angles. The angles in each set are given below. Which set will form a triangle?

a)

45°, 65°, 70°

b)

150°, 110°, 100°

c)

50°, 50°, 50°

d)

90°, 90°, 90°

3.

Find the indicated angle measure. (What is ?)

a)

51°

b)

37°

c)

167°

d)

41°

4.
Find the measure of each angle indicated.
a)
88
b)
30
c)
110
d)
85
5.
Solve for x.
a)
7
b)
9
c)
-11
d)
-6
6.
Solve for x.
a)
5
b)
12
c)
-7
d)
-6
7.

What is the value of x?

a)

38

b)

57

c)

76

d)

85

8.
a)
11
b)
25
c)
35
d)
50
9.
Find the measure of the indicated angle. 
a)
80
b)
58
c)
42
d)
138
10.
Solve for x.
a)
4
b)
6
c)
7
d)
-10
11.
Solve for x.
a)
-11
b)
9
c)
-9
d)
10
12.
Find the measure of the indicated angle. 
a)
40
b)
108
c)
72
d)
68
13.
Vertical angles are always
a)
acute
b)
total 180 degrees
c)
congruent (equal measures)
d)
adjacent angles
14.

Find the measure of angle A.

a)

75o

b)

60o

c)

30o

d)

38o

15.

What is the measure of angle A?

a)

44o

b)

96o

c)

-14o

d)

63o

16.
Find the measure of the indicated angle. 
a)
34
b)
46
c)
62
d)
36
17.
Which of the following terms best describes Angle d?
a)
Remote interior angle
b)
Corresponding angle
c)
Exterior angle
d)
Interior angle
18.

Find the indicated angle measure. (What is ?)

a)

51°

b)

37°

c)

167°

d)

41°

19.

Set up an equation to find x.

a)

52 + 5x + 16 + 10x + 8 = 180

b)

52 - 5x + 16

c)

52 + 5x + 16 = 10x + 8

d)

52 + 10x + 8 = 5x +16

20.

Solve for x.

a)

1

b)

2

c)

3

d)

4

21.

Solve for x

a)

3

b)

4

c)

2

d)

1

22.

What is the measure of angle E?

a)

6

b)

7

c)

38

d)

43

23.

What is the measure of angle CDP?

a)

67

b)

152

c)

4

d)

9

24.
Solve for x.
a)
-11
b)
9
c)
-9
d)
10
25.
a)
x = 54
b)
x = 9
c)
x = 24
d)
x = 144