E. Unit 2 Test 2 Triangle Sum Theorem CFA

Front

What does the Triangle Sum Theorem state?

Back

The Triangle Sum Theorem states that the sum of all angles in a triangle is 180°.

Front

What is the measure of the angles in a triangle if one angle is 90° and another is 45°?

Back

The measure of the third angle is 45°.

Front

If one angle of a triangle is 60° and another is 70°, what is the measure of the third angle?

Back

The third angle measures 50°.

Front

What is the sum of the interior angles of a triangle?

Back

The sum of the interior angles of a triangle is 180°.

Front

If two angles of a triangle are 30° and 60°, what is the measure of the third angle?

Back

The third angle measures 90°.

Front

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

Back

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

Front

If angle A = 45° and angle B = 45°, what is angle C in triangle ABC?

Back

Angle C measures 90°.

Front

What is the measure of an exterior angle of a triangle?

Back

An exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

If angle A = 50° and angle B = 60°, what is the measure of the exterior angle at vertex C?

Back

The exterior angle at vertex C measures 110°.

Front

What is the formula to find the measure of an unknown angle in a triangle?

Back

The formula is: Unknown angle = 180° - (sum of the other two angles).