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You can turn the rectangle diagonal or straight up.
You could do but how many different widths and lengths could it be. I'll help you with the first one...
The rectangle could be 12cm wide and 1cm long. That would equal a perimeter of 26cm.
Um 2 for the short side and 11 for the other size?
Then you could do 3 for the short side and 10 for the other.
You would continue this pattern on and on.
My name is Mr Plowman and I think that Maths is fantastic!!! I love learning about Maths, I love teaching Maths... I just love everything to do with Maths!