Find the perimeter of the shaded region shown, where each square has a length of $1$1 unit.
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Find the perimeter of the shaded region shown, where each square has a length of $1$1 unit.
Find the perimeter of the shaded region shown, where each square has a length of $1$1 unit.
Find the perimeter of the shaded region shown, where edges are 1 unit in length each.