A set of shapes has five pieces:
Can you make a square using four of the pieces?
You may like to use the interactivity below to try out your ideas, or download this sheet with two sets of pieces for printing and cutting.
Now, can you make a square using all five pieces?
Now, add another set of five pieces (so now there are ten). Can you make a square with all of them?
Printable NRICH Roadshow resource.