The Polygon Angle-Sum Theorem

Find the measure of ONE exterior angle of a regular decagon.

• 36
• 10
• 18
• 40

Tags

CCSS.HSG.CO.A.1

A polygon with six sides is called a(n) ______________.

• hexagon
• pentagon
• decagon
• septagon

Tags

CCSS.2.G.A.1

A polygon with 8 sides is called a(n) __________________.

• octagon
• decagon
• heptagon
• dodecagon

Tags

CCSS.2.G.A.1

Find the sum of the interior angles of a nonagon.

• 1260
• 900
• 1620
• 180

Solve for x. 

• 100
• 120
• 125
• 130

Tags

CCSS.2.G.A.1

Find the measure of one interior angle in regular 25-gon. Round your answer to the nearest tenth if necessary.

• 164.3⁰

• 167.1⁰

• 165.6⁰

• 166.7⁰

Tags

CCSS.HSG.CO.A.1

Find the measure of one exterior angle in the regular polygon. Round your answer to the nearest tenth if necessary.

• 32.7⁰

• 90⁰

• 45⁰

• 60⁰

What is the sum of the measures of the exterior angles of a decagon?

• 1440⁰

• 360⁰

• 144⁰

• 1800⁰

Find the value of x.

• 540⁰

• 121⁰

• 134⁰

• 360⁰

Tags

CCSS.7.G.B.5

• 20 sides

• 21 sides

• 12 sides

• 180 sides