Mario claims that a rhombus is sometimes a square, but a square is always a rhombus. Is he correct? Explain.

yes

Step-by-step explanation:

he is correct because a square is always a rhombus because one of the def of a square is a rhombus with right angle. a rhombus is not always a square because rhombuses do not have to have right angles. they only need to have adjacent sides congruent and be a parallelogram. it can be a rhombus without right angles, so Mario is correct. if a rhombus does have right angles, (sometimes it will) then it will be a square.