A rhombus is a type of parallelogram whose diagonals are perpendicular to each other. 

Properties of Rhombus:

1. Opposite sides are parallel.

2. Opposite angle are equal.

3. All four sides are equal

4. Diagonals bisect each other at right angles.

5. Adjacent angles are supplementary. 

If a and b are the lengths of diagonals of a rhombus then, 

Area = (a * b)/ 2.

Perimeter = 4 * sides. 

This is where MathsOne comes in, we believe in the core principles of knowledge and understanding and we always strive to instill the fundamentals on to to the young minds.