interior and exterior angles of polygons

What is the sum of measures of interior angles of a 23 gon?

• 3460

• 3620

• 3780

What is the measure of EACH interior angle of a regular 18 gon?

• 140

• 160

• 190

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

• 180

• 360

• 1440

• 144

What is the measure of each exterior angle of a regular 20-gon?

• 360

• 162

• 18

• 3240

If the sum of the interior angles of a polygon is 1,980° , how many sides does it have?

• 13

• 14

• 15

If the measures of a heptagon are 127° , 152° , 112° , 123° , 135° , and 105° , what is the measure of the remaining angle?

• 138

• 146

• 154

• 168

The sum of the interior angles of a polygon is 3960°. How many sides does the polygon have?

• 22

• 24

• 26

What is the measure of EACH exterior angle of a 21-gon?

• 360

• 17.14

• 18.94

• 18

What is the sum of the measures of the interior angles of an octagon?

• 1080

• 720

• 900

• 1260

What is the measure of each exterior angle of a regular 30-gon?

• 15

• 12

• 19