This topic covers the skill of calculating the perimeter of different shapes laid out on a 1x1 grid. It evaluates the understanding of geometric concepts, specifically focusing on rectangles to find which one has the longest perimeter. This problem set is part of an introductory module on perimeters, aiding learners in recognizing how different shapes on a grid can have varying perimeters, despite occupying a similar area.
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Which shape on the 1x1 grid has the longest perimeter?