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A Chinese geometric puzzle consisting of a square cut into seven pieces that can be arranged to make various other shapes.
‘Of indeterminate age - at least 150 but maybe much older, say, dating back to Pythagoras and his right triangles - the 7 tangram pieces (credited by some sources to the Chinese) can form countless different designs.’
‘Designing this stuff is a little like making a tangram.’
‘Some mornings I'll put the tangram sets on the table with a puzzle for each child to solve.’
‘Tangrams consist of two small triangles, one medium triangle (the size of two small ones joined), a parallelogram and square (also equal to two small triangles), and two large triangles, equal to four small ones.’
‘It is interesting however to see how many convex figures you can make from the 7 tangram pieces.’