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 1 b = base 2 h = vertical height
Area of Ellipse	Area = πab	a = radius of major axis b = area of the minor axis