The square is probably the best known of the quadrilaterals. It is defined as having all sides equal. All its interior angles are right angles (90°). From this it follows that the opposite sides are also parallel. A square is simply a specific case of a regular polygon, in this case with 4 sides. All the facts and properties described for regular polygons apply to a square. The rectangle, like the square, is one of the most commonly known quadrilaterals. It is defined as having all four interior angles 90° (right angles). The opposite sides of a rectangle are parallel and congruent. A difference between a square and rectangle is that O A, all sides are equal in a square, whereas only opposite sides are equal in a rectangle. O B. all the interior angles are right angles. O c. only opposite sides are equal in both the figures. O D. both are quadrilaterals.​ i know the answer just wanted to give you guys free points