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WorksheetsSum Angles of Triangles
Total questions: 33
Worksheet time: 25mins
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.
Find the measure of the angle indicated.
a)
139°
b)
66°
c)
138°
d)
116°
3.
What is the third angle of a triangle whose 1st angle is 79 and the 2nd angle is 43?
a)
43
b)
58
c)
72
d)
101
4.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
5.
Solve for x.
a)
16
b)
11
c)
50
d)
6
6.
If all three angles are exactly the same measure, how big is each angle?
Hint: x + x + x = 180
Hint: x + x + x = 180
a)
180 degrees
b)
90 degrees
c)
50 degrees
d)
60 degrees
7.
Angles that are exactly 90 degrees are called _____ ______.
a)
tight angles
b)
acute angles
c)
obtuse angles
d)
right angles
8.
If 2 of the angles of a triangle are 30 and 70 degrees, the third angle measures...
a)
80
b)
100
c)
60
d)
90
9.
Find the measure of the indicated angle.
a)
26
b)
36
c)
85
d)
144
10.
Solve for x.
a)
71
b)
-3
c)
35
d)
-19
11.
Find the measure of angle A.
a)
75o
b)
60o
c)
30o
d)
38o
12.
Which of the following angles can you add together to equal angle d?
a)
Angle a and Angle b
b)
Angle b and Angle c
c)
Angle a and Angle c
d)
Angle a and Angle b and Angle c
13.
Which of the following terms best describes Angle d?
a)
Remote interior angle
b)
Corresponding angle
c)
Exterior angle
d)
Interior angle
14.
What is the measure of angle b?
a)
36o
b)
56o
c)
63o
d)
117o
15.
a)
A
b)
B
c)
C
d)
D
16.
a)
A
b)
B
c)
C
d)
D
17.
Find the value of x.
a)
A
b)
B
c)
C
d)
D
18.
What is the missing angle?
a)
90°
b)
87°
c)
80°
d)
88°
19.
Find the measure of each angle indicated.
a)
139°
b)
66°
c)
138°
d)
116°
20.
What is the SUM of the angle measures in a triangle (3 sides)?
a)
60°
b)
90°
c)
120°
d)
180°
21.
Find the measure of each angle indicated.
a)
88
b)
30
c)
110
d)
85
22.
Find the measure of each angle indicated.
a)
38
b)
47
c)
40
d)
70
23.
Find the measure of each angle indicated.
a)
48
b)
87
c)
35
d)
40
24.
Find the measure of each angle indicated.
a)
50
b)
32
c)
40
d)
100
25.
Find the measure of each angle indicated.
a)
50
b)
85
c)
45
d)
49
26.
Solve for x.
a)
6
b)
8
c)
15
d)
13
27.
Solve for x.
a)
6
b)
8
c)
15
d)
13
28.
Solve for x.
a)
8
b)
-10
c)
-7
d)
6
29.
How do you find the missing angle?
a)
124 + 77
b)
2(77)
c)
180 - 77
d)
124 - 77
30.
Remote interior angles of a triangle are...
a)
inside a triangle and are not adjacent to the exterior angle
b)
inside a triangle and are adjacent to the exterior angle
c)
outside a triangle and are not adjacent to the exterior angle
d)
outside a triangle and are adjacent to the exterior angle
31.
The remote interior angles of a triangle are 6y - 4 and 6y. The exterior angle is 128. What is the value of y?
a)
y = 11
b)
y = -11
c)
y = 66
d)
y = 62
32.
The remote interior angles of a triangle are 5y + 3 and 4y + 8. The exterior angle is 146. What is the value of y?
a)
y = 15
b)
y = -15
c)
y = 78
d)
y = 68
33.
The remote interior angles of a triangle are 4y - 4 and 3y. The exterior angle is 52. What is the value of y?
a)
y = 8
b)
y = -8
c)
y = 128
d)
y = 28
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