This is a classic Tangram puzzle. Use it to build a square (the most common tangram puzzle) or even build things like a running person.
Tangram puzzles through hundreds of years have provided lots of fun and challenge to the players. Now take it to the next level by playing with Tangrams on your iPhone.
These Tangram pieces are very flexible just like a 3D version. With just a tap you can rotate it 45 degrees at a time.
Go on build great things!