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Math worksheet for finding the perimeter of a rectangle when one side is unknown, featuring six practice problems with diagrams and equations.

Worksheet titled "Finding the Perimeter of a Rectangle—Unknown Side" with six problems showing rectangles and equations to calculate unknown sides using perimeter formulas.

Worksheet titled "Finding the Perimeter of a Rectangle—Unknown Side" with six problems showing rectangles and equations to calculate unknown sides using perimeter formulas.

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