How to make a triangle with five puzzles?

Make a triangle with five puzzles, as shown in the figure:

Remove the two largest triangles in the puzzle, and the remaining five pieces are triangles. Arrange in two rows:

The first line is a parallelogram, a small triangle, a square and a small triangle, and the next line is a middle triangle.

/kloc-in the 0/8th century, the jigsaw puzzle spread abroad. Needham said that it is one of the oldest pastimes in the East. Up to now, the library of Cambridge University in England still has a collection of "seven ingenious pieces".

Tangram is an ancient traditional intellectual toy in China. As the name implies, it consists of seven boards. These seven boards can be combined into many figures (1600), such as triangles, parallelograms, irregular polygons, etc. Players can also combine them into various characters, images, animals, bridges, houses, towers, etc., or some Chinese and English letters.

Tangram was invented by the working people in ancient China, and its history can be traced back to at least the first century BC, and it was basically finalized in the Ming Dynasty. Ming and Qing Dynasties were widely circulated among the people in China. Qing people wrote in Volume I of Cold Records Miscellaneous Knowledge: There are seven ingenious pictures with five shapes and seven numbers recently, and there are thousands of changes. Things are small in shape, changing at will, and full of games, which are enough to relieve boredom and break the silence, so secular people like them.

References:

Baidu encyclopedia-jigsaw puzzle