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.
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.
The circumference of a rhombus is given by:
where a is the side length.