Unit 7: Polygons and Quadrilaterals

What is the sum of interior angles formula?

• $S\ =\ \left(n-2\right)\cdot180$

• $S=\left(n+2\right)\cdot180$

• $S=\left(n-2\right)+180$

• $S=\left(n\cdot2\right)+180$

The sum of the exterior angles of any polygon is ____________?

• 360

• 180

• 90

• 240

What is the sum of the measure of the interior angles of a 27-gon?

• $400\degree$

• $4500\degree$

• $1250\degree$

• $2500\degree$

The sum of the interior angles of a polygon is  $1620\degree$   .  How many sides does the polygon have?

• 10

• 11

• 9

• 12

Solve for x.

• $144\degree$

• $244\degree$

• $156\degree$

• $200\degree$

Solve for x.

• 8

• 12

• 14

• 20