How to make a rectangle with a jigsaw puzzle?

You can spell it in many ways, as follows:

Step 1: First, put the hypotenuse of two big triangles into the square on the left, and take a right angle of the big triangle as the width of the rectangle to be assembled.

Step 2: Put a small triangle on the upper right corner of the square in step 1, so that its two right-angled sides face upward and left respectively, and then use the long side of the parallelogram to be next to the hypotenuse of the small triangle, and the short side to be connected with the right-angled side of the small triangle. Then lean against the other long side of the parallelogram with the right angle side of the middle triangle. Note that the hypotenuse of the middle triangle faces right and becomes the right width of the rectangle.

Step 3: There is a square and a small triangle left. The square is left blank and the small triangle is placed at the end.

Tangram is an intellectual game, so as the name implies, Tangram consists of seven chessboards. These seven boards can be combined into many figures (more than a thousand kinds), such as triangles, parallelograms, irregular polygons and so on. Players can also combine them into various figures, images, animals, bridges, houses, towers and so on. And some Chinese and English letters. Tangram is a traditional intellectual game in China, and puzzles have many functions to develop intelligence. In a simple pendulum, hand-eye coordination is needed. Because the hand and the brain are connected, the fine activities of the hand not only train the stability of the child's hand, but also stimulate the development of brain cells.

The jigsaw puzzle is simple in structure, and it is easy for people to mistakenly think that it is easy to solve its problems, but this idea is one-sided. /kloc-more than 0/600 patterns can be put together by puzzles, some are easy to spell, some are quite mysterious, and some are specious and full of contradictions.