6B Sum of Interior Angles of Polygons

Front

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

Back

180°

Front

How do you calculate the sum of the interior angles of a polygon?

Back

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

Front

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

Back

108°

Front

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

Back

120°

Front

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

Back

135°

Front

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

Back

360°

Front

What is the measure of each angle in an equilateral triangle?

Back

60°, 60°, 60°

Front

If a polygon has 20 sides, what is the sum of its interior angles?

Back

3,240°

Front

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

Back

144°

Front

How many sides does a polygon have if the sum of its interior angles is 1,440°?

Back

10 sides.