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 \(\begin{array}{l}a^{2}\end{array} \)
List of Formulas
| Figures | Formula | Variables |
| Rectangle | Area = l \(\begin{array}{l}\times\end{array} \) w | l = length w = width |
| Square | Area = \(\begin{array}{l}a^{2}\end{array} \) | a = sides of square |
| Triangle | Area = \(\begin{array}{l}\frac{1}{2}\end{array} \) bh | 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 = \(\begin{array}{l}\pi\end{array} \) ab | a = radius of major axis b = radius of minor axis |
