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You could print off this sheet of the shapes, then cut them out and look at one shape at a time. Try turning the shape round so that it is a different way up.
Think about what you know about triangles - do you think this shape is a triangle? Why? Why not? Explain your ideas to someone else and see if they agree!
Triangle or No Triangle?
Age 5 to 7
Challenge Level 
You could print off this sheet of the shapes, then cut them out and look at one shape at a time. Try turning the shape round so that it is a different way up.
Think about what you know about triangles - do you think this shape is a triangle? Why? Why not? Explain your ideas to someone else and see if they agree!
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