Neat stuff. You can have it a bit easier, though, even if not quite so general. Take a rectangular piece of paper and lay it in front of you with one the the short sides near you. Fold it in half from left to right (the long way) and unfold it again. Now bring the lower left corner onto the crease from the first fold, and crease a second fold through the lower right corner. The second crease makes a 30 degree angle with the lower edge.
Actually, I wasn't able to follow your instructions, Edley. I get line 6 to be parallel to line 3 (45 degrees). I think there's a mistake, but I haven't figured it out yet. --Art Carlson -----Ursprungliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Auftrag von Edley Gesendet: Saturday, December 01, 2001 1:48 AM An: [email protected] Betreff: Trigon-Folding Dear Membership, Here is more help for Emergency Sundial Makers. Trigon - Folding When you need 15, 30, 45, 60, 75 degree angles to lay out radially from a gnomon to create hour lines and don't even have a pencil, but do have something foldable; paper, foil, starched linen, etc., here is how to fold these angles. There turns out to be a number of ways to do this, but I'll describe only one. It involves trisecting an angle. I found the method on http://chasm.merrimack.edu/~thull/geoconst.html Starting from a scruffy piece of fom (foldable material) with no straight lines in it's shape. A. Fold ...
