Triangle Angle-sum and Exterior Angle Theorem Practice

Front

True or False: Every triangle that can be drawn has angles that add up to exactly 180 degrees.

Back

True

Front

What is the measure of angle b if angle a is 144° and angle c is 36°?

Back

36°

Front

Which of the following terms best describes Angle a if it is opposite to the exterior angle?

Back

Remote interior angle

Front

Find the measure of the angle indicated if the exterior angle is 139° and one of the interior angles is 73°.

Back

66°

Front

Find the indicated angle measure if angle x is 139° and angle y is 41°. What is angle z?

Back

41°

Front

What is the Triangle Angle-Sum Theorem?

Back

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 is formed by one side of the triangle and the extension of an adjacent side.

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 relationship between an exterior angle and the two remote interior angles?

Back

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

Front

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

Back

Angle C = 70° (since 180° - 50° - 60° = 70°).