I needed some angle cuts that extended well past the limits of most protractors. I haven’t been in school for more than forty years and never took geometry or any other class beyond basic math. As such, playing with complex formulas or compasses (which are mostly small and no less limited than protractors) was not something I was wont to do. No doubt, many others are like me in that fact.

All these things said, I came up with a means of, very accurately, finding any angle. It does involve several steps, but my digital and other protractors indicated I was quite close in my measurements. In truth, I believe any inaccuracies were in projecting the line of the short (no longer than 12”) protractors, rather than my calculations/methods.

I will share the approach, of course, but I’d like to see how others got there, or would get there using just a ruler and a bit of mathematical rambling, at basic levels. I will say using pi is fair, though I did not. Again, I used only a ruler. Anyone want to weight in?

Jeff VandenbergrepliedJeff Vandenberg aka "Woodsconsin"

KellyrepliedBrianrepliedLosing fingers since 1969

KellyrepliedKellyrepliediGotWoodrepliedI-Got-Wood