Angles

Estimating angles

Name: ______________________________Date: ______________Score: ______ / 20

1.
How many degrees are there in one right angle?
°
2.
How many degrees are there in two right angles?
°
3.
How many degrees are there in three right angles?
°
4.
How many degrees are there in four right angles?
°
5.
Half a right angle is how many degrees?
°
6.
An angle that is a little less than a right angle is about...
1. A45°
2. B80°
3. C150°
7.
The best estimate for an angle that is close to a straight line is about...
1. A175°
2. B90°
3. C30°
8.
After turning four right angles you face the same direction you started in.
True False
9.
An angle between 45° and 90° could be about...
1. A65°
2. B20°
3. C120°
10.
An angle between 90° and 135° could be about...
1. A110°
2. B40°
3. C10°
11.
An angle between 0° and 45° could be about...
1. A30°
2. B100°
3. C160°
12.
An angle between 135° and 180° could be about...
1. A150°
2. B60°
3. C20°
13.
Is a 65° angle greater or less than a right angle?
1. ALess
2. BGreater
3. CEqual
14.
Is a 110° angle greater or less than a right angle?
1. ALess
2. BGreater
3. CEqual
15.
A small, sharp angle is best estimated as...
1. A95°
2. B60°
3. C10°
16.
An angle of 45° is half a right angle.
True False
17.
An angle a bit bigger than a right angle is about...
1. A100°
2. B45°
3. C10°
18.
A full turn is how many degrees?
°
19.
Which is the best estimate for an angle that looks a bit less than half a right angle?
1. A20°
2. B90°
3. C150°
20.
An estimate of 175° is a good estimate for an angle that clearly looks close to a right angle.
True False

Answer key

Angles — Estimating angles

1.90 °
2.180 °
3.270 °
4.360 °
5.45 °
6.B. 80°
7.A. 175°
8.True
9.A. 65°
10.A. 110°
11.A. 30°
12.A. 150°
13.A. Less
14.B. Greater
15.C. 10°
16.True
17.A. 100°
18.360 °
19.A. 20°
20.False