What defines a rectangle?

A rectangle is defined by having properties that include both parallel opposite sides and having four right angles.

To elaborate, the definition includes that in a rectangle, each pair of opposite sides are equal in length and parallel, which ensures that the shape maintains a consistent distance throughout. Furthermore, a rectangle has four right angles, meaning each angle measures 90 degrees. This combination ensures that the shape is not only confined within parallel lines but also adheres to the specific angle requirements that classify it as a rectangle.

While other characteristics may apply to rectangles—such as diagonal properties—they are not part of the defining features of a rectangle. Thus, the correct answer effectively summarizes what establishes a rectangle based on these two fundamental properties.