Image reference: upload.wikimedia/ * * */Mons/Thumb/11f/make _ a _ tangram.svg/350px-make _ a _ tangram.svggtangram is an intellectual game. As the name implies, the jigsaw puzzle consists of seven boards. Because of the equal product transformation, these seven boards can be combined into many figures (more than a thousand kinds), such as triangles, quadrangles, irregular polygons, various figures, images, animals and so on. Chinese and English letters (0-9) can even be combined into a picture if they are matched with two or more pairs of puzzles. The structural puzzle consists of the following seven boards, and the complete pattern is a square. Two small isosceles right triangles (hypotenuse length 1), one middle isosceles right triangle (hypotenuse length picture reference: upload.wikimedia/math/e/f/5/ef5590434a 387b3c4427e 09d5b08baf) and two large isosceles right triangles (hypotenuse length 2). A square (side length picture reference: upload.wikimedia/math/1/b/6/1b617f10629a1ca486bfec1446bfec. A parallelogram (side length 1 and picture reference: upload.wikimedia/math/1/b/6/1b 617f10629a1ca486bf. Tangram is the English name of Tangram. There are many stories about the origin of this English name, among which three are the most popular: it comes from the abandoned English word "Tangram", which means grotesque gadgets. "Tang" is a suffix of the Tang Dynasty in China. And "gram" comes from Greek "γ ρ α μ μ?" The word means "straight line"; The whole word means "straight line in Tang Dynasty". Judging from the slang "Tanka", it is said that the water residents who used to live on the southeast coast of China were called egg houses. They provide food for some businessmen on the ferry. Besides providing food, they also provide some entertainment, one of which is a seven-piece China puzzle. The word "Tangram" is about tanka's game-"the game of other people on board". These three statements have some basis, but most westerners think the second statement is the most reliable. According to the research of modern mathematical historians, Tangram was invented by China people in the Ming and Qing Dynasties. A few people say that jigsaw puzzles have been invented for more than a thousand years. The development process of China began with Yan Ji Tu in Song Dynasty, and evolved into Butterfly Wing Tu in Ming Dynasty, a jigsaw puzzle from early Qing Dynasty to modern times. The original face of Yanji Tangram is "Yanji Map", which means greeting guests for dinner. Huang, a scholar in the Northern Song Dynasty, initiated this idea. He first designed six rectangular boxes, which can be adjusted according to the number of guests at the banquet, and then added a small one. When all seven situations are put together, it will become a big rectangle, and the combination can change endlessly. It's almost like a modern jigsaw puzzle. Later, according to the principle of "swallowing several pieces", Geshan in Ming Dynasty designed "Butterfly Wings", which was composed of thirteen different triangular figures. Together, it is the shape of a butterfly spreading its wings. After being separated, it can spell out more than 100 graphics. Tangram Modern Tangram was developed on the basis of "Yan Ji Tu" and "Die Ji". Tangram from other countries soon spread to Japan and Europe in the Ming and Qing Dynasties. 1805, the book introducing China Tangram has been included in the European bibliography. Japanese puzzles are slightly different from those in China, and should be formed by changing the central square of the butterfly pattern. Because Japan published the book "Learn to Speak Less Wisdom Board" in 1742, and the earliest existing book about Tangram in China-"The Picture of Qiqiao" was published in 18 13, so the Japanese think that Tangram was invented by the Japanese. How to play a jigsaw puzzle is very simple, that is, to spell out all kinds of ever-changing patterns with jigsaw puzzles, or to compete with friends to see who can spell the most. Benefits and Uses Tangram has numerous benefits and uses. The following are the benefits and uses of Tangram: shape concept, visual discrimination, cognitive skills, visual memory, hand-eye coordination, encouraging open and diffused thinking and creating opportunities. Tangram is a good partner to inspire children's intelligence, both ancient and modern. It can connect children with objects and forms, and has great development space for cultivating children's observation, imagination, morphological analysis and creative logic. Now it is widely used by parents to help children learn basic logical relations and mathematical concepts. It can help children understand the meaning of various geometric figures, numbers, perimeters and areas, and understand Pythagorean theorem. Tangram can also teach children to recognize colors and guide them to understand the division and synthesis of graphics, thus enhancing their hand intelligence, patience and observation. It can also be used to tell stories, connecting dozens of puzzle pictures into a series of connected pictures, which can be told to children like cartoons. Spell out a few cats, dogs and a house first, and you can tell a wonderful and moving story (for example, a big cat meets a dog prince). Similar to the game, although Tangram can make many different graphics, there is a big limitation in shape: it can't make curves. In addition, there are always some figures in the puzzle that can't be made. So ancient and modern Chinese and foreign countries have designed games similar to puzzles. There are two kinds of pictures of swallows and butterflies' wings just now, and the rest are: wisdom puzzles, double-circle puzzles, Japanese puzzles, nine puzzles, five puzzles, four puzzles, nine-ring and six-ring Huarong Road Luban Lock, four-happiness Gate, Tang Tuhua Fahrenheit puzzles, broken-hearted magic egg cross fragments, Egyptian puzzles, Archimedes' treasure chest, human face lion puzzles and left puzzles, among which these ancient China toys are collectively called puzzles and nine puzzles. If you like, you can prepare some colored pens. Image reference: upload.wikimedia/ * * */zh/thumb/6/63/tangram _ step1120px-tangram _ step1/. First, draw a square on the paper and divide it into sixteen small squares. Image reference: upload.wikimedia/ * * */zh/thumb/9/9c/tangram _ step2/120px-tangram _ step22. Draw a line from the upper left corner to the lower right corner. Image reference: upload.wikimedia/ * * */zh/thumb/7/7d/tangram _ step3/120px-tangram _ step33. Connect a line from the top middle to the right middle. Image reference: upload.wikimedia/ * * */zh/thumb/117/tangram _ step4/120px-tangram _ step44. Draw a line from the lower left corner to the upper right corner, and touch the second line to stop. Image reference: upload.wikimedia/ * * */zh/Thumb /f/F8/ Tangram _ step 5/ 120 px- Tangram _ step5 5. Draw a line from the lower left corner to the upper right corner, and touch the second line to stop. Image reference: upload.wikimedia/ * * */zh/thumb/112/tangram _ step6/120px-tangram _ step66. Draw a line from the end of the line just now and draw it to the bottom three quarters. Count from the left and stop when you touch the line. Image reference: upload.wikimedia/ * * */zh/thumb/3/35/tangram _ final/120px-tangram _ final7. Finally, paint them in different colors and cut them with black wire, and you have a brand-new puzzle. Image reference: upload.wikimedia/ * * */Mons/Thumb/7/7a/tangram-man.svg/180px-tangram-man.svg Image reference: zh. * * */skins- 1.5/mon/images/majestic-clip one。

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