Put a big triangle directly below, spell a middle triangle on the right of the big triangle, put a small triangle on the right of the middle triangle, and turn right.

Put a parallelogram under the middle triangle, a square under the small triangle, a small triangle under the parallelogram and a big triangle in the upper right corner, and the triangle is made up.

The three triangles of different sizes in the puzzle are actually three isosceles right triangles. You will find that each right angle and each acute angle in the five triangular plates are the same size, two large triangular plates are the same size, two small triangular plates are the same size, and there is a medium triangular plate. The acute angles of the five triangles in the puzzle are all the same, all 45? .

Tangram uses seven boards to spell out ever-changing image patterns in various ways. Divide a square into seven pieces and it becomes a jigsaw puzzle. Each corner of the five triangles is the same size, with a right angle and two acute angles, so that the puzzle can spell out the triangle.

Extended data:

Modern intelligence puzzle is a kind of educational toy designed on the basis of traditional puzzles and referring to the principles of modern higher mathematics. Compared with traditional puzzles, the patterns are more vivid and diverse, which can exercise the ability of hands and brains and inspire creative consciousness.