Angles of Polygons

Front

What is the measure of one interior angle in a regular pentagon?

Back

108°

Front

What is the name of a polygon if one interior angle measures 140°?

Back

Nonagon

Front

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

Back

360°

Front

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

Back

Decagon

Front

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

Back

180(n−2)

Front

How many sides does a polygon have if each interior angle measures 120°?

Back

6 sides (Hexagon)

Front

What is the measure of each exterior angle in a regular hexagon?

Back

60°

Front

What is the sum of the interior angles of a triangle?

Back

180°

Front

What is the measure of one interior angle in a regular octagon?

Back

135°

Front

How do you calculate the number of sides in a regular polygon if the measure of each interior angle is known?

Back

Use the formula: n = 360° / (180° - interior angle) where n is the number of sides.