No, not all parallelograms are rectangles. While all parallelograms have opposite sides that are parallel and equal in length, a rectangle has additional requirements: all angles must be 90 degrees. A parallelogram only becomes a rectangle if its angles are right angles, which is not always the case. For instance, a rhombus is a type of parallelogram where all sides are equal, but its angles are not necessarily 90 degrees, so it’s not a rectangle. Therefore, while every rectangle is a parallelogram, not every parallelogram qualifies as a rectangle. The distinction lies in the specific properties of angles and symmetry.
