### Area Formulas - List of Area Formulas

This page gives you a quick reference to all the important Area formulas.

# What is Area?

The area is the size of a two-dimensional surface.  It is defined as the amount of two-dimensional space occupied by an object. Area formulas have many practical applications in building, farming, architecture, science. The area of a shape can be determined by placing the shape over a grid and counting the number of squares that covers the entire space. For example, the area of a square can be calculated using a2 where a is the length of its side.

# List of Area Formulas

 Figures Area Formula Variables Area of Rectangle Area = l × w l =  length w  = width Area of Square Area  = a2 a = sides of a square Area of a Triangle Area = 12bh b = baseh = height Area of a Circle Area = πr2 r= radius of a circle Area of a Trapezoid Area =12(a + b)h a =base 1b = base 2h = vertical height Area of Ellipse Area = πab a = radius of major axisb = area of the minor axis