Polygons Review

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 measure of each angle indicated. 

• 139°
• 66°
• 138°
• 116°

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

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

What is this?

• ray
• line
• right angle
• obtuse angle

A shape with 8 sides is called a __________.

• octagon
• pentagon
• hexagon
• triangle

 What is the name of this polygon?

• a pentagon
• a quadrilateral
• an octagon
• a triangle