History of the tangram puzzle
Tangram puzzles originated in Imperial China during the Tang Dynasty, they are thought to have travelled to Europe in the 19th century on trading ships.
Tangram puzzles were popular during World War 1 and have become the most popular dissection puzzle in the world. Besides, tangram patterns have also been described as early psychological tests.
Tangram patterns are called in China "Chin-Chiao Pan" meaning intriguing seven piece puzzle.
A book published in China in 1815 by Shan-Chiao contains 374 puzzle patterns.
Early Chinese mathematicians manipulated geometric shapes in their problem solving. A technique that is still applied in classrooms today, inter alia, through the use of tangrams.