Polygon Angles and Parallelogram Properties

Front

What is a parallelogram?

Back

A parallelogram is a quadrilateral with opposite sides that are both parallel and congruent.

Front

How can you determine if a quadrilateral is a parallelogram?

Back

A quadrilateral is a parallelogram if one pair of opposite sides is both parallel and congruent.

Front

What is the formula to find the sum of the interior angles of a polygon?

Back

Front

How do you find the measure of one interior angle of a regular polygon?

Back

Front

What is the measure of each exterior angle of a regular polygon?

Back

Front

If the sum of the interior angles of a polygon is 2880°, how many sides does it have?

Back

The polygon has 18 sides.

Front

What is the measure of one interior angle of a regular 15-gon?

Back

The measure of one interior angle of a regular 15-gon is 156°.

Front

What is the measure of each exterior angle of a regular 20-gon?

Back

The measure of each exterior angle of a regular 20-gon is 18°.

Front

What are the properties of opposite sides in a parallelogram?

Back

In a parallelogram, opposite sides are equal in length and parallel.

Front

What is the relationship between the interior and exterior angles of a polygon?

Back

The interior and exterior angles of a polygon are supplementary, meaning they add up to 180°.