How many degrees are in a right angle?

A right angle measures exactly 90 degrees. This is a fundamental concept in geometry, where angles are defined based on their measurement in degrees. A right angle is significant because it serves as the basis for defining perpendicular lines and is a key reference point in various applications across mathematics, engineering, and construction. Knowing that a right angle is 90 degrees helps in understanding various geometric properties, such as forming rectangles and squares, where four right angles contribute to the overall structure. In summary, recognizing that a right angle is 90 degrees is essential for understanding both basic and advanced geometric principles.