Why do this
is based on the popular Tangram activities. It may help to extend
pupils' concepts of triangles and it will encourage them to use
How have you done this?
What have you tried so far?
How could you join these two shapes? Where could
the third piece go?
Take a large square and cut it up into a variety of shapes,
These are the classic tangram pieces and there are many interactive
tangrams on NRICH in the World of Tan series.
Plastic or card shapes would be helpful.