7r + 8t + 16
Work Step by Step
To find the perimeter, we write it as a sum of the length of each side. Then, combine like terms. 3t + 3r + 7 + 5t + 9 + 4r = 3r + 4r + 3t + 5t + 7 + 9 = 7r + 8t + 16
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