Asked by Kyleigh

When Ms. Lopez asked her class to use their tiles and make rectangular arrays for the counting numbers 1 to 12, Robert made only one rectangle for 4 (1 by 4) and one for 9 (1 by 9). He did not form a 2-by-2 square and a 3-by-3 square for these numbers because he said they were not rectangles. What would you say to Robert?
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