Polygon Interior Angle Sum

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

• 1440°
• 900°
• 1080°
• 1260°

What is the SUM of the angle measures in a triangle (3 sides)?

• 60°
• 90°
• 120°
• 180°

Find the value of X.

• 100
• 120
• 125
• 130

Find the measure of the missing angle

• 95

• 85

• 35

• 45

Which formula represents how to find the interior angle sum of any polygon?

• (number of sides - 2) x 180

• (number of sides + 2) x 180

• number of sides x 180

• number of sides x 360

Find the value of x.

• 110

• 90

• 130

• 120

The sum of the interior angles in a polygon is 3,240^o.  How many sides are in the polygon?

• 10
• 582,840
• 18
• 20

What is the sum of the interior angles of the hexagon shown?

• 180° 
• 540° 
• 720° 
• 1080° 

What is the sum of the interior angles of the nonagon shown?

• 720° 
• 900° 
• 1080° 
• 1260° 

What is a regular polygon?

• all side lengths are the same length

• all angles are the same (equal in measure)

• only some side lengths are the same

• all side lengths are different

• only some angles are the same