# Rhombus

A rhombus is a quadrilateral, of which all sides are of equal length

The opposite angles are equal.

The two diagonals are pependucular and intersect each other in both their midpoints.

## Area

The area of a rhombus can be calculated in different ways, depending on the data you have.

If the diagonal lengths are given:

where d1 and d2 are the diagonal lengths.

If the side length and an angle is given:

where α is the angle and a is the side length.

If the side length and the radius of the inscribed circle is given:

Where a is the side length and r is the radius of the inscribed circle.

## Calculate the area of a rhombus

 Diagonal length (d1): Diagonal length (d2): Side length (a): Angle in degrees (alpha): Radius of the inscribed circle (r):

## Circumference

The circumference of a rhombus is given by:

where a is the side length.