Product name: Puzzle puzzle   700 a case

Origin: Zhejiang

Product size: 11.4*11.4*0.7cm

Product weight: 0.035kg

Pay attention toA few cents can buy things really not much!This tangram is suitable for taobao sellers to use as gifts, the quality of workmanship is not perfect, mainly because it is cheap, dear friends do not hold high expectations for the quality, do not buy back after saying why so bad! If not as good as imagined, can be returned, freight paid!!

     Tangram board, also known as the seven clever map, wisdom board, is the han folk spread of intelligence toys. It evolved from feasting in the Song Dynasty, which was originally an indoor game for literati and later evolved into patchwork toys among the folk. According to lu Yitian in qing DynastyCold room noise\"Said: songHuang BosiThe banquet charts, the square tables and the seven tables, the long section of the ginseng, and the twenty-five bodies, became sixty-eight. Ming yan 瀓 adjustment a few figure, is flexible in terms of its system, in the shape of hypotenuse, triangle phase fault type, such as butterfly wings. The formula three, the system six, the dozens of three, the variation of the formula, more than 100. In recent years, there are seven ingenious graphs, in which the number of five and seven vary by as many as a thousand. Body shape, casual change, cover the game, enough to exhaust stuffy broken lonely, so the secular are happy for it. ” The tangram is cut into five small Pythagorean shapes from a square, which can be pieced together into various things, such as people, plants and animals, houses, pavilions, cars and Bridges, etc., which can be played by one person or played by many people. The tangram can be used to elucidate some important geometric relations, the principle of which is the ancient arithmetic. The in and out phase complement principle. .