Angles in 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

Tags

CCSS.7.G.B.5

What polygon is this?

• pentagon

• octagon

• quadrilateral

• hexagon

Tags

CCSS.2.G.A.1

Find the value of y.

• 125
• 135
• 140
• 110

Tags

CCSS.7.G.B.5

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

• Octogon

• Nonagon

• Decagon

• Dodecagon

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

• Octogon

• Nonagon

• Decagon

• Dodecagon

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

• 180(n−2)

• 180(n−2)÷n

• 360

• 360/n

Tags

CCSS.7.G.B.6

What is the formula for the sum of exterior angles in a polygon?

• 180(n−2)

• 180(n−2)÷n

• 360

• 360/n

Tags

CCSS.HSA.SSE.A.1

What is the sum of exterior angles for a 27-gon?

• 4860

• 4500

• 360

• 270