Polygon Angles

What is the SUM of the angle measures in a nonagon (9 sides)?

• 1440°

• 900°

• 1080°

• 1260°

What is the SUM of the INTERIOR angles of a 12-gon?

• 3600

• 1800

• 2160

• 12

What is the measure of ONE interior angle in a regular pentagon (5-sides)?

• 90°

• 108°

• 120°

• 180°

Find the measure of the sum of the exterior angles in a hexagon

• 360

• 180

• 720

• 540

step 1: set up an equation

step 2: Solve for x

step 3: Plug in x for each expression

step 4: Add the two answers from step 3

• 82

• 41

• 17

• 90

Tags

CCSS.HSG.CO.C.11

step 1: set up an equation

step 2: Solve for x

step 3: Plug in x for each expression

step 4: Add the two answers from step 3

• 82

• 41

• 17

• 90

Tags

CCSS.HSG.CO.C.11

Find the measure of the sum of the exterior angles in a 23-sided polygon

• 360

• 180

• 720

• 2300

What is the formula for the SUM of the interior angles in a regular polygon?

• 180(n−2)

• 360

Find the angle sum of the interior angles of the polygon.

• 180° 

• 540° 

• 720° 

• 1080° 

What is the measure of each interior angle of an octagon?

• 135

• 1080

• 360

• 45