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Measure and classify angles.

Are these angles acute, right, obtuse, or straight?

• right angles

• obtuse angles

• acute angles

• straight angles

Is this angle acute, right, obtuse, or straight?

• acute

• right

• obtuse

• straight

What is the measurement of this angle?

• 110

• 75

• 100

• 115

Find missing angles in triangles.

What is the measure of the missing angle?

• 80

• 180

• 70

• 65

Find missing angles in triangles

What is the measure of the missing angle?

• 20

• 25

• 30

• 40

Two of the angles in a triangle measure 74° and 74°. What is the measure of the third angle?

• 90

• 40

• 32

• 180

What is the measure of the missing angle in the triangle below?

• 27

• 47

• 67

A triangle has angles that measure 70° and 30°. What is the measure of the third angle?

• 30

• 40

• 80

• 100

Without using a protractor, find the measure of X.

• 45 degrees

• 28 degrees

• 32 degrees

• 118 degrees

Without using a protractor, find the measure of angle QRT.

• 315 degrees

• 45 degrees

• 135 degrees

• 145 degrees