A rhombus has 4 equal sides but no right angles
It has 4 sides and 4angles
A parallelogram with equal sides is a rhombus.
It is a quadrilateral with two pairs of parallel sides, with the pairs meeting one another at right angles.
A parallelogram which has all congruent sides and angles is a square.
2 pairs of equal sides
Rhombus has 4 equal sides and no right angles
A square. Its opposite sides are equal and it has 4 right angles.
You don't tell us enough information. In a square, there are four sides and four angles. The sides are all equal and the angles are all right angles. In a rectangle, there are four sides and four angles The opposite sides are equal and the angles are all right angles. There is no other shape in which all angles are right angles.