All four sides of a rhombus are congruent. A trapezoid can have at most three congruent sides.
If you mean a rhombus then some of its properties are:- It's a 4 equal sided quadrilateral shape It has 2 opposite equal acute angles and 2 opposite equal obtuse angles Its 4 interior angles add up to 360 degrees Its 2 diagonals intersect each other at right angles It will tessellate