As students move to thinking about formulas it supports their conceptual knowledge of how the perimeter of rectangles can be put into general form. What formula below displays a common student error for finding the perimeter?

a) P = l + w + l + w
b) P = l + w
c) P = 2l + 2w
d) P = 2(l + w)


b

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Indicate whether the statement is true or false.

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