### Home > CC2MN > Chapter 7 > Lesson 7.1.4 > Problem 7-45

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The perimeter is the sum of all the sides. Mark each side with its length to help you find the perimeter. The same algebra tile digram, as the problem, with the following lengths, starting on the top left, and going clockwise: 1, 1, x, x, x, 1, x, 1.

Combine like terms to form an expression of the perimeter.

cmSubstitute

for in the algebra tile shape or the expression you found to find the perimeter for this given value. The same algebra tile digram, with the following lengths, starting on the top left, and going clockwise:1, 1, 7, 7, 7, 1, 7, 1.

cmSubstitute

for in the algebra tile shape or the expression you found to find the perimeter for this given value. The same algebra tile digram, as the problem, with the following lengths, starting on the top left, and going clockwise: 1, 1, 5.5, 5.5, 5.5, 1, 5.5, 1.