Properties of Parallelograms & Polygon Angles

Match the following.

• one interior angle measure of a regular polygon

• sum of the interior angle measure

• n

• one exterior angle measure of a regular polygon

• sum of the exterior angle measure

• the number of sides of a regular polygon

Answer explanation

Be sure to add your formulas to your formula sheet. "n" represents the number of sides.

What is the sum of the measures of the interior angles of a pentagon in degrees?

Mathematical Equivalence

OFF

What is the measure of EACH interior angle of a regular octagon in degrees?

What is the measure of EACH interior angle of a regular octagon in degrees?

• 22

• 24

• 26

• 28

Find the value of x.

Find the value of x.

All parallelograms are quadrilaterals.

• Always

• Sometimes 

• Never

The figure PQRS is a parallelogram. What is the value of x?

• 72

• 74

• 76

• 78

Given that WXYZ is a parallelogram, find the value of b.

• 6

• 8

• 10

• 12