Which of the following quadrilateral is not a rhombus? (a) All four sides are equal (b) Diagonals bisect each other (c) Diagonals bisect opposite angles (d) One angle between the diagonals is `60^@`

Explanation

As we know that properties of a rhombus :

All four sides are equal.

Diagonal bisects each other at right angles.

Hence, we can say that one angle between the diagonal is `60^@`.

`therefore`, option (d) is correct.