Angles in Polygons

Front

What is the sum of the interior angles of a polygon with n sides?

Back

(n - 2) x 180°

Front

How many degrees are in each interior angle of a regular polygon with n sides?

Back

(n - 2) x 180° / n

Front

What is the sum of the angle measures in a triangle?

Back

180°

Front

What is the sum of the angle measures in a quadrilateral?

Back

360°

Front

How do you find the measure of an exterior angle of a polygon?

Back

360° / n, where n is the number of sides.

Front

What is a nonagon?

Back

A polygon with 9 sides.

Front

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

Back

108°

Front

If a polygon has 12 sides, what is the sum of its interior angles?

Back

1800°

Front

What is the relationship between interior and exterior angles of a polygon?

Back

Interior angle + Exterior angle = 180°

Front

How do you calculate the number of sides of a polygon if you know the sum of its interior angles?

Back

n = (sum of interior angles / 180) + 2