In's and Outs Lesson 3

The sum of the interior angles of a polygon is __________________ where n is the number of sides.

• (n - 2)180
• (n - 1)180
• 360
• (n - 3)(180)

Find the sum of the interior angles of a nonagon.

• 1260
• 900
• 1620
• 180

Solve for x. 

(**HINT: Don't just assume the angles are symmetrical!)

• 100
• 120
• 125
• 130

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

• 1440⁰

• 360⁰

• 144⁰

• 1800⁰

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

• 1440⁰

• 360⁰

• 144⁰

• 1800⁰

The sum of the exterior angles of a polygon is __________________ where n is the number of sides.

• 360
• n
• (n - 2)180
• (n - 1)180

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

• 36
• 10
• 18
• 40

Calculate the sum of the interior angle measures of a polygon with 25 sides.

• 360 degrees
• 4500 degrees
• 335 degrees
• 4140 degrees