Triangle Angle Sum and Exterior Angle Theorem

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 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

State 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 angle A = 50° and angle B = 60°, what is angle C in triangle ABC?

Back

Angle C = 180° - (50° + 60°) = 70°.

Front

How do you find the measure of an exterior angle if the two non-adjacent interior angles are 40° and 70°?

Back

The exterior angle = 40° + 70° = 110°.

Front

What is the relationship between the angles in a triangle?

Back

The sum of the angles in a triangle is always 180 degrees.

Front

If one angle of a triangle is 90°, what type of triangle is it?

Back

It is a right triangle.

Front

What is the measure of an exterior angle if one interior angle is 30° and the other is 50°?

Back

The exterior angle = 30° + 50° = 80°.

Front

If angle A = 30° and angle B = 70°, what is angle C?

Back

Angle C = 180° - (30° + 70°) = 80°.

Front

What is the sum of the exterior angles of any polygon?

Back

The sum of the exterior angles of any polygon is always 360 degrees.