CPM Homework Help : AC Problem 2-45

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2-45.

Positive algebra tiles are arranged as follows: Row 1: 2, vertical, x tiles and 1, x squared tile, are aligned at the top. Rows 2 and 3 each have 2 unit tiles aligned on the left. Write an expression that represents the perimeter of the shape built with algebra tiles at right.

Hint:

The same arrangement of algebra tiles with the following labels on the edges of each tile, Starting on the top left, and going clockwise as follows: 1, 1, x, x, x, 1, 1, 1, 1, 1, 1, x.