Triangle Angle Sum and Exterior Angle Theorems Check-In

Front

The Triangle Sum Theorem states that the sum of all angles in a triangle is ______.

Back

180°

Front

Find the measure of the indicated angle: If two angles are 95° and 40°, what is the measure of the third angle?

Back

45°

Front

Find the measure of the missing angles: If angle A is 30° and angle B is 60°, what is angle C?

Back

90°

Front

What is the value of the missing angle? If one angle is 90° and another is 20°, what is the missing angle?

Back

70°

Front

Which of the following terms best describes Angle d? If angle d is formed outside of triangle ABC, what is it called?

Back

Exterior angle

Front

What is an interior angle?

Back

An angle formed inside a triangle by two sides.

Front

What is an exterior angle?

Back

An angle formed outside a triangle by one side and the extension of another.

Front

What are remote interior angles?

Back

The two angles inside a triangle that are not adjacent to a given exterior angle.

Front

State the Exterior Angle Theorem.

Back

The measure of an exterior angle is equal to the sum of the measures of the two remote interior angles.

Front

If one angle of a triangle is 50° and another is 60°, what is the third angle?

Back

70°