How many kinds of jigsaw puzzles are there in the original picture?

Tangrams puzzle original picture picture there are 3 kinds, many people may think that tangrams have seven kinds of graphics, in fact, is not, tangrams just have to be divided into seven pieces, but there are only three kinds of graphics.

After separating the seven pieces of the tangram puzzle, you can realize that the tangram puzzle is composed of equilateral triangles, parallelograms, and squares, not seven shapes. The triangles in the jigsaw puzzle are all equilateral triangles, although they vary in size.

The tangram is a kind of intellectual toy for children aged 3 to 6. However, many adults also like to play jigsaw puzzles. Because, the function of tangram is really powerful.

The tangram board is an old traditional Chinese intellectual toy, which, as the name suggests, is made up of seven boards. And these seven boards can be put together into many shapes (more than 1600 kinds), such as triangles, parallelograms, irregular polygons, and players can also put it into various characters, images, animals, bridges, houses, towers and so on, as well as some Chinese and English letters.

The tangram is an invention of the ancient Chinese working people, whose history can be traced back to at least the first century B.C., and was basically finalized in the Ming Dynasty. Ming and Qing dynasties in China, widely circulated in the folk, the Qing Lu Yixue "cold hut miscellany" Volume 1 wrote: recent and seven trick map, its style five, its number seven, its changes in the style of up to more than a thousand.

The body of the shape of the object, with the hands of change, cover the game of tools, enough to exhaust the boredom to break the silence, so the world are happy for it. In the 18th century, tangrams spread abroad. Joseph Lee said it is one of the oldest pastimes in the East, the library of Cambridge University in the United Kingdom also holds a "new spectrum of the seven coincidences".