perplexus.info :: Geometry : Decagon and Dodecagon Areas

Decagon and Dodecagon Areas (Posted on 2010-05-11)

The area of a regular decagon inscribed in a circle is 10 square units.

What is the area of the regular decagon circumscribed about the circle? How about the area of the regular dodecagon circumscribed about the circle?

See The Solution Submitted by K Sengupta

Rating: 2.6667 (3 votes)

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CIRCUMSCRIBED/INSCRIBED= 1/COS( 18)^2=1.105573

Edited on May 12, 2010, 7:58 pm

Posted by Ady TZIDON on 2010-05-11 15:44:15

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