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

What is the Exterior Angle Theorem?

Back

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

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

If two angles of a triangle are 70 degrees and 40 degrees, what is the measure of the third angle?

Back

The third angle measures 70 degrees (180 - (70 + 40)).

Front

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

Back

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

Front

How do you calculate the exterior angle of a triangle?

Back

To calculate the exterior angle, add the measures of the two non-adjacent interior angles.

Front

What is the measure of an exterior angle if the two non-adjacent interior angles are 30 degrees and 50 degrees?

Back

The exterior angle measures 80 degrees (30 + 50).

Front

What is the formula for finding the sum of the angles in a polygon?

Back

The sum of the interior angles of a polygon can be found using the formula (n - 2) * 180 degrees, where n is the number of sides.

Front

What is the measure of each interior angle in a regular triangle?

Back

Each interior angle in a regular triangle measures 60 degrees.

Front

If one angle of a triangle is 45 degrees and another is 55 degrees, what is the measure of the third angle?

Back

The third angle measures 80 degrees (180 - (45 + 55)).