My grandmother used to amuse me by making five-pointed stars from a piece of paper. She’d fold it, make one cut, then hand it to me to unfold. The stars had five points, and the angles were all even. How did she do this? I’d ask Grandma but she died last year and won’t respond to the Ouija board. –Katharyn Bine, Reston, Virginia
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Step 1. Fold a piece of paper in quarters, then unfold it again as shown.
Step 5. Unfold one of the folds of angle A as shown.
Easier said than done. Most silent movies were shot at 16 frames per second, about the fastest you could manage in the early days and still have a quiet, reliable projection machine. When shown, the film flickered annoyingly but the action moved at normal speed. (Usually. It’s said Charlie Chaplin had his cameras run slower than normal to produce a comical speedup when the film was projected.)
