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designing and building with wood channels my creativity and challenges my mind.
This blog is a record of my life in my studio.

Monday, November 7, 2011

Building a Square Base Pyramid

when it came time to build a pyramid out of plywood, I found myself stumped. This seemingly simple task is made extremely complicated by the compound angles of the mitered edges of each panel in the pyramid.

I eventually created a truncated pyramid with trapezoidal sides with base angles of 22.5 degrees, and edge miter angles of 40.2 degrees each. I couldn't see any rhyme or reason to the relationship between these two angles, so I looked online.

This explanation is a pretty good one.

But then I found this calculator, which is even better! (no math).  but alas, it doesn't show the angles between the sides.   

THEN, I found this gem of a site: the Miter saw calculator website, with calculators for all kinds of compound miter cuts. 

I used it to predict the angles on my NEXT pyramid. Now, If I could only find tools accurate enough to make the cuts...

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