# Area Calculator

Calculates area and perimeter of various geometrical shapes. Useful to students and people working with land area measurements.

#### Square

All four sides of a square has equal length.Side Length

#### Rectangle

In a regular rectangle opposite sides are equal. However, in irregular rectangle such as land, sides can be of different lengths. For irregular rectangle first we divide the rectangle into two triangles and them use Heron's formula to calculate area of each triangle separately and add both the areas to compute the area of the rectangle.Side Length (AB)

Side Length (BC)

Side Length (CD)

Side Length (DA)

Diagonal (BD)

#### Triangle

Enter the length of sides of triangle. We use Heron's formula to calculate area of a triangle.Side Length (AB)

Side Length (BC)

Side Length (CA)

#### Circle

Enter the radius of the circle.Radius (r)