Depending on exactly what you mean:
A rhombus has four sides that are equal, but four angles that are not all necessarily equal.
A rectangle has sides that are not all necessarily equal, but four angles that are equal.
Depending on exactly what you mean:
A rhombus has four sides that are equal, but four angles that are not all necessarily equal.
A rectangle has sides that are not all necessarily equal, but four angles that are equal.