SOLUTION: <img src="https://i.ibb.co/Yb98jVn/Screenshot-2019-05-29-Files.png">

Question 1141653:
Answer by ikleyn(52932) (Show Source): You can put this solution on YOUR website!
.

See the lesson
- Area of a regular n-sided polygon via the radius of the circumscribed circle and
in this site.

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