Chapter 3

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

What is the measure of angle X if it is supplementary to 59 degrees?

Back

121 degrees.

Front

Which pair of angles are alternate exterior angles?

Back

Angle 8 and Angle 1.

Front

What is the formula for the sum of the interior angles of a polygon?

Back

(n - 2) * 180, where n is the number of sides.

Front

What does the Triangle Sum Theorem state?

Back

The sum of all angles in a triangle is 180°.

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

How do you find the measure of an angle if you know its supplementary angle?

Back

Subtract the measure of the known angle from 180°.

Front

What is the relationship between alternate interior angles when two parallel lines are cut by a transversal?

Back

They are equal.

Front

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

Back

180°.

Front

If a polygon has 5 sides, what is the sum of its interior angles?

Back

540° (calculated as (5 - 2) * 180).