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Finding Missing Angle Measurement in Triangles

Total questions: 24

Worksheet time: 2hrs 48mins

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.
What is the third angle of a triangle whose 1st angle is 34 and 2nd angle is 101?
a)
32
b)
39
c)
45
d)
54
3.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
4.
Find the measure of the indicated angle. 
a)
95
b)
85
c)
35
d)
45
5.
Find the measure of each angle indicated.
a)
50
b)
55
c)
60
d)
70
6.
Find the measure of each angle indicated.
a)
62
b)
53
c)
71
d)
50
7.
Find the measure of each angle indicated.
a)
22
b)
25
c)
29
d)
55
8.
Find the measure of each angle indicated.
a)
50
b)
20
c)
29
d)
48
9.
Solve for x.
a)
6
b)
5
c)
-11
d)
4
10.
Solve for x.
a)
6
b)
-10
c)
7
d)
-9
11.
Solve for x.
a)
16
b)
11
c)
50
d)
6
12.
Solve for x.
a)
7
b)
9
c)
-11
d)
-8
13.

The Exterior Angle Theorem states...

a)

the sum of two outside angles of a triangle = an interior angle

b)

any two interior angles of a triangle added together = the outside angle

c)

the sum of the remote interior angles of a triangle = the outside angle

d)

the interior angles of a triangle added together = 180 degrees

14.
Which of the following terms best describes Angle d?
a)
Remote interior angle
b)
Corresponding angle
c)
Exterior angle
d)
Interior angle
15.

Which two angles are the remote interior angles to Angle W?

a)

Angle X and Angle Y

b)

Angle X and Angle Z

c)

Angle Y and Angle Z

d)

Angle Z and Angle W

16.
What is the measure of angle b?
a)
36o
b)
56o
c)
63o
d)
117o
17.

Find the indicated angle. (What is ?)

a)

91°

b)

81°

c)

89°

d)

109°

18.
What is the measure of angle b?
a)
36o
b)
56o
c)
63o
d)
117o
19.

Choose a correct equation to find x.

a)

4x - 2 + 12x + 1 = 75

b)

4x - 2 + 75 = 12x + 1

c)

4x - 2 + 75 + 12x + 1 = 180

d)

4x - 2 - 75

20.
Find the value of x.
a)
A
b)
B
c)
C
d)
D
21.
Which triangles are similar to triangle A?
a)
B
b)
C
c)
Both
d)
None
22.
Which triangles are similar to triangle A?
a)
B
b)
C
c)
Both
d)
None
23.
Are the triangles similar?
a)
Yes
b)
No
24.

What are similar triangles?

a)

Triangles whose corresponding side lengths are congruent but their angle measurements are proportional.

b)

Triangles whose sum of their interior angles equal 180 degrees.

c)

Triangles whose corresponding angles are congruent but side lengths are proportional to one another.

d)

Triangles that are the same size but have different angle measurements.

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