This math topic focuses on recognizing and comparing the perimeters of different shapes arranged on a 1x1 grid. Each problem presents two shapes to determine which one has the longest perimeter. The shapes are generally complex or irregular, aligning well with an introductory study of perimeter calculations. The topic is designed to heighten skills in geometry, specifically in understanding how to measure the boundary length around various geometric figures presented on a coordinate grid. It's a practical application of perimeter knowledge using visualization and comparison techniques.