The Tangram (Chinese game meaning "seven boards of skill") is a dissection puzzle consisting of seven flat shapes, called tans, which are put together to form shapes. The objective of the puzzle is to form a specific shape (given only an outline or silhouette) using all seven pieces, which may not overlap.
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
Of these seven pieces, the parallelogram is unique in that it has no reflection symmetry but only rotational symmetry, and so its mirror image can be obtained only by flipping it over. Thus, it is the only piece that may need to be flipped when forming certain shapes.
Step 1: Material required
I have used thick white cardboard. And for attaching the pieces together, one can use nut bolts and shafts (like shown in the picture).
I have made the shafts with the same cardboard (you can also try finding them in the market, if you don't want to make them). I've made the shafts by cutting the cardboard in these shapes and punching both the corners (easy and quick)!
Step 2: How to make these shapes?
Once you've cut the pieces, single punch the corners of all. This will help later for fixing them together!