Verify Rectangle Properties: Number of Right Angles Analysis

To determine whether the given statement is true or false, we must rely on the fundamental properties of a rectangle.

A rectangle is a type of quadrilateral that has the following defining properties:

• All four interior angles are right angles, each measuring $90^\circ$.
• The opposite sides are parallel and equal in length.

Based on these properties, each angle in a rectangle is always a right angle. Therefore, contrary to the statement given, a rectangle does not have only one right angle; in fact, it has four right angles.

Thus, the statement "There is only one right angle in a rectangle" is False.