Interior and Exterior Angles of Polygons

Front

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

Back

180°

Front

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

Back

S = (n-2) × 180° where n is the number of sides.

Front

If a polygon has 5 sides, what is the sum of its interior angles?

Back

540°

Front

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

Back

120°

Front

What is the exterior angle of a polygon?

Back

An exterior angle is formed by one side of the polygon and the extension of an adjacent side.

Front

What is the sum of the exterior angles of any polygon?

Back

360°

Front

If one exterior angle of a regular polygon is 30°, how many sides does it have?

Back

12 sides.

Front

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

Back

Interior angle + Exterior angle = 180°.

Front

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

Back

Interior angle = (n-2) × 180° / n.

Front

What is the measure of an interior angle of a regular octagon?

Back

135°.