Divide a circular disk into seven parts with a straightedge and compass such that each part has the same area and perimeter.

(In reply to Ca c'est pas possible by vije)

That's incorrect. Constructing a regular heptagon will never be done with a straightedge and a compass, but division of a circle into 7 equal parts (in terms of both area and perimeter) is done here. See Jer's picture, and work out the algebra if you need to.

Posted by Eric on 2004-12-10 19:45:59