This warm-up activity focuses on applying geometry concepts to real-world scenarios, specifically in park planning. Students are tasked with identifying bases and heights for triangular and quadrilateral shapes and using relevant area formulas to calculate areas for various features on a map. The exercise includes matching shapes to their respective area formulas and analyzing a Central Park map to extract dimensions for a rectangular lawn and a triangular pond. The final part encourages students to formalize their findings and create a cheat sheet of key rules for future activities.