Area Formulas

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
\(\begin{array}{l}a^{2}\end{array} \)
where a is the length of its side.

Area of a Square

List of Formulas

Figures Formula Variables
Rectangle Area = l
\(\begin{array}{l}\times\end{array} \)
l =  length

w  = width

Square Area  =
\(\begin{array}{l}a^{2}\end{array} \)
a = sides of square
Triangle Area =
\(\begin{array}{l}\frac{1}{2}\end{array} \)
b = base
h = height
Circle Area =
\(\begin{array}{l}\pi\end{array} \)
\(\begin{array}{l}r^{2}\end{array} \)
r = radius of circle
Trapezoid Area =
\(\begin{array}{l}\frac{1}{2}\end{array} \)
(a + b)h
a = base 1
b = base 2
h = vertical height
Ellipse Area =
\(\begin{array}{l}\pi\end{array} \)
a = radius of major axis
b = radius of minor axis


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