Dissection puzzles

Move, turn and flip pieces to build a shape. Pick a kind of puzzle.

• Tangram 5 puzzles. Seven pieces, many shapes.
• Pythagoras proofs 7 puzzles. Picture proofs that a² + b² = c².
• Dudeney 3 puzzles. Henry Dudeney's famous cuts.
• Classic 2 puzzles. Old puzzles: Archimedes' Ostomachion and the T.
• Pentominoes 5 puzzles. Twelve five-square pieces fill a rectangle.