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Simple Polygonal Angles

Geometry Level 2

The interior angle of a regular polygon is 30 degrees less than six times the exterior angle.

How many sides does the polygon have?

Excel in math and science

Master concepts by solving fun, challenging problems.

It's hard to learn from lectures and videos

Learn more effectively through short, conceptual quizzes.

Our wiki is made for math and science

Master advanced concepts through explanations,
examples, and problems from the community.

Used and loved by 4 million people

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including olympiad champions, researchers, and professionals.

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by Sam Cheung

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