Do you remember learning the Pythagorean theorem ( a
2 + b
2 = c
2 ) when you were in school? Well, here's a visual way of showing it.  Eureka.  Isn't it beautiful?
 Annairizi of Arabia (circa A.D. 900)
Is anyone out there a quilter?  I bet this would make a really lovely (albeit nerdy) quilt.