Another idea of shape (with also sharp angles) is the "Two Piece Pyramid Puzzle" http://gamesmuseum.uwaterloo.ca/VirtualExhibits/puzzles/pyramid/ http://gamesmu

Another idea of shape (with also sharp angles) is the "Two Piece Pyramid Puzzle" http://gamesmuseum.uwaterloo.ca/VirtualExhibits/puzzles/pyramid/ http://gamesmuseum.uwaterloo.ca/VirtualExhibits/puzzles/pyra...