Area Calculations
Square
The area of a square is the product of its length by its width:
Area of Rectangle = Length × Width
Triangle
The area of a triangle is one half the product of its longest side by its widest point:
Area of Triangle = ½ × Longest Side × Widest Point
Circle
The area of a circle is the number π multiplied times its radius squared:
Area of Circle = π × Radius2
π ≈ 3.14159265