Explore Tangrams and their geometric properties in the classroom using the overhead projector. Shape, size, congruence, similarities, and symmetry are a few of the properties you'll discover. Assembled, each seven-piece puzzle (including a square, parallelogram, and five triangles) makes a square. Tangrams are a great source for stimulating and challenging problem-solving explorations. Includes four sets of overhead Tangrams and an activity sheet.