what is a straight angle

A straight angle is an angle that measures 180 degrees. It is called a straight angle because it appears as a straight line, and its sides lie in opposite directions from the vertex in the same straight line. A straight angle is exactly half of a revolution, and it can be formed by rotating one ray by 180 degrees with respect to another ray. A straight angle is also known as a "flat angle". Some examples of straight angles in our day-to-day life include a flat surface, a plane inclined staircase, and the angle between the minute hand and hour hand at 6:00. The straight angle is represented as 180° in degrees and π in radians.