111.6.b.5.C
111 111.6 111.6.b 111.6.b.5 111.6.b.5.C
use models to determine the formulas for the perimeter of a rectangle ($l + w + l + w$ or $2l + 2w$), including the special form for perimeter of a square ($4s$) and the area of a rectangle ($l \times w$); and
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