Polygons

What is the sum of the measures of the interior angles of a 19-gon?

• 180°
• 3420°
• 161.1°
• 3060°

If the sum of the measures of a polygon is 1800°, how many sides does it have?

• 10
• 12
• 14
• 16

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

• 1260°
• 1620°
• 140°
• 180°

What is the sum of the exterior angles of a 25-gon?

• 14.4°
• 4140°
• 360°
• 165.6°

What is the measure of each exterior angle of a regular decagon?

• 36°
• 360°
• 1440°
• 144°

Find the value of x.

• 900
• 128.6
• 121
• 56

Find the value of x.

• 18
• 540
• 180
• 22.7

Find the value of x.

• 135
• 7
• 9.8
• 1080

Find the value of x.

• 31
• 360
• 720
• 13