Pyramid roof for birdhouse

[Jim Riseborough]

I am trying to build a 4 sided roof for a bird house. I cant figure out the life of me the best way to get the angles right on the four slopes. I dont know if there is a formula to use if you have a certain height of the roof, based on the inside square of the pyramid. anyone have a formula to figure it?

[Mike OMelia]

http://mathforum.org/library/drmath/view/55261.html

Mike

[Chris Rosenberger]

I hate math, so I draw a full size pattern of one side on a piece paper or plywood. That will give me the angle the sides & bottom need to be cut at.
Then all I have to figure out is the bevel angle for the corners. I do that by trial & error.

[bob hertle]

http://www.wwch.org/TechData/CompMiterBevAng.htm

As always, google is your friend!

Bob