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trapeziod
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Tony Welscher
Mar 2, 2007, 9:04:24 AM3/2/07
to geometry-p...@moderators.isc.org
First let me say that if this is too simple for this site I am sorry. I'm
just a old timer that is trying to maximize my cuts on a sheet of plywood.
just a old timer that is trying to maximize my cuts on a sheet of plywood.
Trapezoid Question
I know the base measurement and the angles of the trapezoid.
I need the sides and the top to be equal
Is there a formula that I can input the base length and angles to find the
3 equal sides?
The reverse to this question
I know the equal length of the 2 sides and the top. I know the degrees of
the angles
Is there a formula that will tell what the base needs to be.
Thanks for your help
Tony
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Tony Welscher
G.E. Ivey
Mar 2, 2007, 11:04:55 AM3/2/07
to app...@support1.mathforum.org
This is a good place to post the question but not TWICE!
Peter Chang
Jul 8, 2008, 8:08:24 AM7/8/08
to app...@support1.mathforum.org
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))]}
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