Just in case you are wondering what tangram is...
It is one of the most popular dissection puzzles in the world. A Chinese psychologist has termed the tangram "the earliest psychological test in the world", albeit one made for entertainment rather than analysis.
Choosing a unit of measurement so that the seven pieces can be assembled to form a square of side one unit and having area one square unit, the seven pieces are:
- 2 large right triangles
- 1 medium right triangle
- 2 small right triangle
- 1 square
- 1 parallelogram