[TheForge] Re: lamp shade

[xlch58 at swbell.net]

Mike Spencer wrote:
> Janet> Okay, that sounds good, but what's the formula for figuring it
> Janet> out?
>
>
> If, on the other hand, this is all Mickey Mouse to you and I'm all
> wrong, show me and I'll go do penance. :-) But I did try some numbers
> and they seemed to come out about right.  As a quick check, imagine
> that S and H are equal.  Then it's a square box with vertical sides
> and A should be 90 deg.  That's what the formula gives.
>
>
> - Mike
>
>   
I don't know if they made it through or not, as so many systems seem to 
think my ID is a junk mail ID, but I posted a couple of sites that 
explain the math, and I think are in agreement with you Mike.


http://www.math.toronto.edu/mathnet/questionCorner/miter.html

or

http://www.josephfusco.org/Articles/Dihedral/Dihedral.html

or

http://mathforum.org/library/drmath/view/56462.html


Charles