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Printjmc
prealgebra senior
Problem
The figure shows a square of side units divided into a square of side units and four congruent rectangles. What is the perimeter, in units, of one of the four congruent rectangles? Express your answer in terms of . 
Solution
Let represent the longer side of the rectangle, which makes the shorter side of the rectangle (since one long side and one short side make up ). Then the perimeter of one of the rectangles is .
Final answer
2y