Pyramid request

[unity100]

well, just take the diagonal that runs from one corner of the base of the pyramid rectangle to the another as the bottom side of the 2d triangle you need, and cut the wood to form 60 degree angles with them.

the wood going to apex from the corner, will need to have 60 degree angle with the base, therefore, it has to have 60 degree angle with the diagonal that runs from the corner its end side is at, to the corner opposite it.