Angles of Polygons

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

• 1440°
• 900°
• 1080°
• 1260°

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

• 90°
• 108°
• 120°
• 180°

Find the value of X

• 94
• 25
• 36
• 180

Find the value of y.

• 125
• 135
• 140
• 110

Tags

CCSS.7.G.B.5

What is the SUM of the exterior angles of a 20-gon?

• 180

• 360

• 3240

• 162

What is the measure of each interior angle of a regular octagon?

• 135

• 180

• 145

• 190

What is a polygon called if the sum of its interior angles equals 1440° ?

• Octogon

• Nonagon

• Decagon

• Dodecagon

The measures of one interior angle of a regular polygon is 140^o. What is the name of the polygon?

• Decagon

• Nonagon

• Heptagon

• Hexagon

Find the value of X.

• 100
• 120
• 125
• 130

Find the missing angle.

• 75
• 85
• 100
• 45

Tags

CCSS.HSG.C.A.3