Angle Naming and Classification

Identify the angle that measures exactly 90 degrees.

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

What is the measure of an angle that is complementary to a 30-degree angle?

• 30 degrees

• 60 degrees

• 90 degrees

• 150 degrees

Using a protractor, measure the angle shown in the diagram below (assume the diagram shows an angle measuring 45 degrees).

• 30 degrees

• 45 degrees

• 60 degrees

• 90 degrees

Classify the angle that measures 120 degrees.

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

Two angles are supplementary. If one angle measures 70 degrees, what is the measure of the other angle?

• 20 degrees

• 70 degrees

• 110 degrees

• 180 degrees

What is the measure of an angle that is supplementary to a 150-degree angle?

• 30 degrees

• 60 degrees

• 90 degrees

• 120 degrees

Classify the angle that measures 45 degrees.

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

Identify the angle that measures exactly 180 degrees.

• Acute angle

• Right angle

• Obtuse angle

• Straight angle

What is the value of "a"?

• 45
• 55
• 35
• 65

Find the missing angle.

• 28

• 32

• 60

• 38