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If the shape is a rectangle, then Perimeter = 2(Length + Width) So Width = Perimeter/2 - Length
You divide the perimeter by the width and you get the lenght
The perimeter of a rectangle is twice the sum of the width and length: perimeter = 2 x (4.6in + 12.1 in) = 33.4 in
you need length and width length multiply width = area length + length + width + width = perimeter
10x2