What do all rectangels squares and rhombuses have in common?

All rectangles, squares, and rhombuses are types of quadrilaterals, meaning they each have four sides. They also share the property of having opposite sides that are equal in length and angles that add up to 360 degrees. Additionally, all three shapes can be classified as parallelograms, as their opposite sides are parallel. Furthermore, they all have diagonals that bisect each other.