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.
How can you put five cereal packets together to make different shapes if you must put them face-to-face?
Take a square of paper. Put a mark half way along each side (ABCD). (You can do this easily by folding.)
Join two midpoints (DC), as shown, then mark half way along the new line (E). Now join this new midpoint to the other two. (EA, EB). Cut along these lines. Now use the four shapes to make a triangle.