Classifying Angles Worksheet
A third-grade math worksheet on classifying angles as right, acute, or obtuse.
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Standards
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Classifying Angles
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Read each question carefully and classify the angle shown as acute, right, or obtuse. An acute angle is less than 90 degrees. A right angle is exactly 90 degrees. An obtuse angle is greater than 90 degrees.
1. What type of angle is shown below?
Acute
Right
Obtuse
Straight
2. Which type of angle measures exactly 90 degrees?
Acute
Right
Obtuse
Reflex
3. An angle that is smaller than a right angle is called an angle.
4. An angle that is larger than a right angle but less than a straight angle is called an angle.
5. A corner of a square is an example of a angle.
6. Look at the angle below. Is it acute, right, or obtuse?
7. Look at the angle below. Is it acute, right, or obtuse?
8. An acute angle is always less than 90 degrees.
True
False
9. An obtuse angle looks like a perfect corner.
True
False
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