Angles

Angles on a straight line

Name: ______________________________Date: ______________Score: ______ / 20

1.
Angles on a straight line add up to how many degrees?
°
2.
Two angles sit on a straight line. One is 105°. What is the other angle?
°
3.
Two angles sit on a straight line. One is 100°. What is the other angle?
°
4.
Three angles on a straight line are 55°, 80° and a°. What is a?
°
5.
Two angles on a straight line are 45° and 75°, plus a third angle a°. What is a?
°
6.
On a straight line there are angles of 25°, 30° and a°. What is a?
°
7.
Two angles sit on a straight line. One is a right angle (90°). What is the other angle?
°
8.
Two angles sit on a straight line. One is 130°. What is the other angle?
°
9.
Angles on a straight line add up to 180°.
True False
10.
If one angle on a straight line is 60°, the other is 100°.
True False
11.
Two angles sit on a straight line. One is 132°. What is the other angle?
°
12.
Two angles sit on a straight line. One is 97°. What is the other angle?
°
13.
Two angles sit on a straight line. One is 16°. What is the other angle?
°
14.
Two angles sit on a straight line. One is 160°. What is the other angle?
°
15.
Two angles sit on a straight line. One is 45°. What is the other angle?
°
16.
Two angles sit on a straight line. One is 114°. What is the other angle?
°
17.
Two angles sit on a straight line. One is 59°. What is the other angle?
°
18.
Two angles sit on a straight line. One is 53°. What is the other angle?
°
19.
Two angles sit on a straight line. One is 50°. What is the other angle?
°
20.
Two angles sit on a straight line. One is 65°. What is the other angle?
°

Answer key

Angles — Angles on a straight line

1.180 °
2.75 °
3.80 °
4.45 °
5.60 °
6.125 °
7.90 °
8.50 °
9.True
10.False
11.48 °
12.83 °
13.164 °
14.20 °
15.135 °
16.66 °
17.121 °
18.127 °
19.130 °
20.115 °