A right angle is an angle that measures exactly 90 degrees. It is one of the most common angles in geometry and is often represented by a small square in the corner of the angle. Right angles are found in various shapes, such as squares and rectangles, where they help define the structure and properties of these figures. In practical terms, right angles are essential in construction and design, ensuring that walls and floors are perpendicular to each other. They are also used in carpentry and engineering to create accurate and stable structures. Understanding right angles is fundamental in many fields, including architecture and mathematics.