Go Geometry Puzzle: Sangaku Japanese Geometry Problem.
Solve the puzzle about
a Sangaku Problem: The
incenters of four triangles in a cyclic quadrilateral form a
rectangle. Sangaku is a Japanese geometry problem. Click and
drag with your mouse to move the 79 piece stars or pentagrams.
(The puzzle requires Java enable browser.)
Go Geometry Puzzle: Sangaku Japanese Geometry Problem.