Date: Jan 21, 2005 1:02 AM
Author: Guess who
Subject: Re: area of an octagon?

On Thu, 20 Jan 2005 21:57:13 GMT, Kyle <Kypointguard@aol.com> wrote:

>Whats the formula for finding the area of a octagon

Divide the figure into triangles [8] wit hapex at the center.

Assume you are given the radius [semi-diagonal]," r", and the length
of side, "s". The length of the altitude of each trianbgle will be
given by sqrt(r^2 - (s/2)^2).

Now, the area of each triangle [and thre are 8 of them] will be half
the base tiems the altitude[height.]

You take it from there.

--
submissions: post to k12.ed.math or e-mail to k12math@k12groups.org
private e-mail to the k12.ed.math moderator: kem-moderator@k12groups.org
newsgroup website: http://www.thinkspot.net/k12math/
newsgroup charter: http://www.thinkspot.net/k12math/charter.html