Printable Tangrams - An Easy DIY Tangram Template - The Kitchen Table Classroom
Tangram - Wikipedia
What is Tangram?, Tangram Shapes with 7 Pieces - Orchids
tangram 28 pièces
Amazon.com: LEARNING ADVANTAGE Tangrams - Set of 28 - Puzzle Blocks for Geometry and Problem Solving - Math Manipulatives for Kids - Practice Early Geometry : Office Products
DONE: Automatically compute sizes of tangram pieces - DonationCoder.com