Interior Angles of Polygons

Objective: I know how to solve problems involving the interior angles of polygons.

The formula to find the sum of the interior angles of any polygon is sum of angles = (n - 2)180° , where n is the number of sides of the polygon.

Read the lesson on angles of a polygon for more information and examples.

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!
Find the size of each interior angle of a regular polygon with

5 sides

20 sides

24 sides

36 sides

Find the number of sides of a regular polygon with an interior angle of

140°

160°

162°

170°

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