Perimeter vs Area

KEY DISTINCTION: Perimeter = distance around (1D, measured in cm, m). Area = space inside (2D, measured in cm², m²). Two different shapes can have SAME perimeter but DIFFERENT areas! Example: Rectangle 6×2 (P=16, A=12) vs Rectangle 5×3 (P=16, A=15). Same perimeter (16), different area! Farmers prefer maximum area for a given fence length — that is why square fields are efficient.