Qiqiaoban square

1. Put one piece of the big triangle in the square box, and then put the other piece of the big triangle in the square box.

2. Two triangular plates make up a half square and a big triangle.

3. Put the triangle plate in the middle into the empty corner of the square box, and the other five plates form another big triangle.

4, put down the small triangle, then put down the small square, and the group color becomes a trapezoidal book.

5. Put down another small triangle, and finally put down the parallelogram to form another trapezoid.

Tangram is an ancient traditional intellectual toy in China. As the name implies, it consists of seven boards, which can form various figures.