Rhombus is a parallelogram where

all sides are equal

i.e. AB = BC = CD = AD

In parallelogram

Opposite sides are equalOpposite angles are equalDiagonals bisect each otherSum of adjacent angles is 180°

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Properties of Rhombus:
**

Since it is a parallelogram,

it will have all its properties

Other properties are

Diagonals bisect each other at right angles

AO = CO and BO = DO

and

∠ AOB = 90°

∠ BOC = 90°

∠ COD = 90°

∠ AOD = 90°