Angles

Acute & obtuse angles

Name: ______________________________Date: ______________Score: ______ / 20

1.
How many degrees are there in a right angle?
°
2.
What type of angle is exactly 90°?
1. AAcute
2. BRight angle
3. CObtuse
3.
An obtuse angle is...
1. Aless than 90°
2. Bbetween 90° and 180°
3. Cexactly 90°
4.
What type of angle is 150°?
1. AAcute
2. BRight angle
3. CObtuse
5.
An obtuse angle is smaller than a right angle.
True False
6.
An obtuse angle is bigger than 90° but smaller than 180°.
True False
7.
Two right angles together make a...
1. Astraight line
2. Bfull turn
3. Cacute angle
8.
An angle of exactly 90° is called a right angle.
True False
9.
Which angle is acute: 110°, 160° or 25°?
1. A110°
2. B160°
3. C25°
10.
An acute angle must be less than how many degrees?
°
11.
A right angle is exactly how many degrees?
1. A45°
2. B90°
3. C180°
12.
Which is bigger, an acute angle or an obtuse angle?
1. AAcute
2. BObtuse
3. CThey are always the same
13.
What type of angle is 145°?
1. AAcute
2. BRight angle
3. CObtuse
14.
What type of angle is 152°?
1. AAcute
2. BRight angle
3. CObtuse
15.
What type of angle is 169°?
1. AAcute
2. BRight angle
3. CObtuse
16.
What type of angle is 34°?
1. AAcute
2. BRight angle
3. CObtuse
17.
What type of angle is 56°?
1. AAcute
2. BRight angle
3. CObtuse
18.
What type of angle is 110°?
1. AAcute
2. BRight angle
3. CObtuse
19.
What type of angle is 19°?
1. AAcute
2. BRight angle
3. CObtuse
20.
Select all the OBTUSE angles.
- A45°
- B100°
- C89°
- D135°
- E170°
- F90°

Answer key

Angles — Acute & obtuse angles