Triangle Sum and Exterior Angle Theorem Practice

Front

What is the Triangle Sum Theorem?

Back

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

Front

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

Back

It is a right triangle.

Front

What is the measure of the third angle in a triangle if the first two angles are 50 degrees and 60 degrees?

Back

70 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

According to the Exterior Angle Theorem, how do you find the measure of an exterior angle?

Back

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 is 30 degrees and another is 70 degrees, what is the third angle?

Back

80 degrees.

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

How do you find the missing angle in a triangle if you know the other two angles?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What is the measure of angle A if angle B is 45 degrees and angle C is 85 degrees?

Back

Angle A is 50 degrees.

Front

If angle x is 40 degrees, what is the measure of the exterior angle adjacent to it?

Back

The exterior angle is 140 degrees.