What Is Area?
Area measures the total amount of two-dimensional space enclosed inside the boundary of a flat shape. It is always expressed in square units (e.g., cm², m², sq ft).
Essential 2D Area Formulas
- Square: Area = side² = a²
- Rectangle: Area = width × height = w · h
- Triangle: Area = ½ × base × height = ½ · b · h
- Circle: Area = π × radius² = π · r²
- Parallelogram: Area = base × height = b · h
- Trapezoid: Area = ½ × (base₁ + base₂) × height
- Ellipse: Area = π × semi-major axis (a) × semi-minor axis (b)