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Classifying Angles Worksheet

A Grade 8 math worksheet focused on classifying angles, including acute, obtuse, right, straight, reflex, complementary, and supplementary angles.

Grade 8 Math GeometryAnglesClassifying Angles
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Includes

Multiple ChoiceFill in the BlanksShort AnswerTrue / FalseMatching

Standards

CCSS.MATH.CONTENT.7.G.A.5CCSS.MATH.CONTENT.8.G.A.5

Topics

mathgeometryanglesgrade 8
7 sections · Free to use · Printable
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Classifying Angles

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Date:

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Read each question carefully and classify the angles as instructed. Use the provided diagrams to help you answer the questions.

1. An angle measuring 90 degrees is called a:

a

Acute angle

b

Obtuse angle

c

Right angle

d

Straight angle

2. Which type of angle measures greater than 90 degrees but less than 180 degrees?

a

Acute angle

b

Obtuse angle

c

Reflex angle

d

Right angle

3. An angle that measures exactly 180 degrees is called a   angle.

4. Two angles are   if their sum is 90 degrees.

5. Two angles are   if their sum is 180 degrees.

6. Classify the angle shown below. Explain your reasoning.

7. Classify the angle shown below. Explain your reasoning.

8. A reflex angle is always less than 180 degrees.

T

True

F

False

9. Complementary angles add up to 180 degrees.

T

True

F

False

Match each angle description with its correct classification.

10. Angle less than 90°

 

a. Straight Angle

11. Angle equal to 180°

 

b. Acute Angle

12. Angle between 180° and 360°

 

c. Obtuse Angle

13. Angle between 90° and 180°

 

d. Reflex Angle