Triangle Angle-sum and Exterior Angle Theorem Practice

Front

What is the Triangle Angle-sum Theorem?

Back

The Triangle Angle-sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

How do you find the measure of a missing angle in a triangle?

Back

To find the measure of a missing angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is an exterior angle of a triangle?

Back

An exterior angle of a triangle is formed by one side of the triangle and the extension of an adjacent side.

Front

What is the Exterior Angle Theorem?

Back

The Exterior Angle Theorem states that the measure of an exterior angle is equal to the sum of the measures of the two non-adjacent interior angles.

Front

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

Back

The third angle measures 70 degrees (180 - 50 - 60 = 70).

Front

What is the relationship between the angles in a right triangle?

Back

In a right triangle, one angle measures 90 degrees, and the sum of the other two angles is 90 degrees.

Front

How can you determine if three angles can form a triangle?

Back

Three angles can form a triangle if their sum is exactly 180 degrees.

Front

What is the measure of an angle that is supplementary to a 45-degree angle?

Back

The measure of the supplementary angle is 135 degrees (180 - 45 = 135).

Front

What is the measure of an angle that is complementary to a 36-degree angle?

Back

The measure of the complementary angle is 54 degrees (90 - 36 = 54).

Front

If angle a and angle b are complementary, and angle a measures 30 degrees, what is the measure of angle b?

Back

Angle b measures 60 degrees (90 - 30 = 60).