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

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

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Cereal Packets

How can you put five cereal packets together to make different shapes if you must put them face-to-face?

Triangle Relations

Stage: 2 Challenge Level: Challenge Level:1
It might be worth printing off the problem so you can cut out the two triangles.
You might want to measure, or fold, or cut, or draw round, or ... (or maybe all of these!).