Mathematics - Geometry - Perimeter and Area - Area of rectangles and squares - Area Formula
5 steps: (1) AREA = the space INSIDE a shape, measured in SQUARE units (cm², m²). (2) Rectangle: Area = length × width. A 5cm × 3cm rectangle has area 15 cm². (3) Square: Area = side × side = side². A 4cm square has area 16 cm². (4) Why it works: we're counting how many unit squares fit inside. 5 co