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Tangram

Tangrams are an ancient form of puzzle making originating in China around 250 years ago. 'Tan' means 'pieces', and 'grams' means 'pictures'. A square is divided into seven pieces: two large triangles, two small triangles, a medium sized triangle, a small square, and a parallelogram. By arranging these 7 geometric shapes, one can create hundreds of different designs of people, animals and objects!

http://www.commercialofficecleaning.com/tangrams-and-puzzles-for-kids.html

http://mathforum.org/trscavo/tangrams/construct.html