The following is copied from Mathematical Tables from Hand Book of Chemistry and Physics.
The area of a regular polygon with n sides of length l = 1/4n(l squared) (cot 180/n)
The area of a circumscribed polygon = n(r squared)tan(pi/n) where pi = 3.14 and
r = the radius of the circumscribed circle = (l/2)cosec(180/n)
Sorry the above is not in strictly math format.. Hope this helps. Regards ... Bob
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