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Can you make five differently sized squares from the interactive tangram pieces?


This activity investigates how you might make squares and pentominoes from Polydron.


Make a cube out of straws and have a go at this practical challenge.

Triangular Faces

Age 7 to 11
Challenge Level

Cong Lu sent us nets of the two shapes in this problem. Here is the first one:

first net

Here is the second one:

second net

Well done. You might have drawn the net a different way, which is absolutely fine, so please send in your net if that's the case.

It can be quite tricky to check whether two nets produce the same shape, can't it? The visualisation is challenging! It can be a good idea to check by making the shape from the net.