Drexel dragonThe Math ForumDonate to the Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.

Math Forum » Discussions » Math Topics » geometry.pre-college.independent

Topic: trapeziod
Replies: 2   Last Post: Jul 8, 2008 4:12 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Peter Chang

Posts: 8
From: new zealand
Registered: 7/5/08
Re: trapeziod
Posted: Jul 8, 2008 4:12 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

Suppose the included angle between the base and its adjacent side is a, the length of the base is b.

The formula for its area A is

A = b^2sin(a)[1 + cos(a)]/[1 + 2cos(a)]^2

If A is given, to find b, use the following formula

b = sqrt{A[1 + 2cos(a)]/[sin(a)(1 + cos(a))]}


Date Subject Author
Read trapeziod
Tony Welscher
Read Re: trapeziod
G.E. Ivey
Read Re: trapeziod
Peter Chang

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum 1994-2015. All Rights Reserved.