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Sally is calculating the perimeters of a number of rectangles, such as the one shown here. She uses the formula P = 2l + 2w. Her younger brother Joe comes by and suggests simplifying the formula to P = 4w. Sally corrects Joe's algebra, but he tries his formula on a rectangle and gets the correct answer! (She checks his work.) What can Sally conclude from this?
A)
Joe's rectangle is oblong.
B)
Joe's rectangle is a square.
C)
Joe's rectangle has no length.
D)
Joe's rectangle wider than it is

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