A straight angle measures 180 degrees. This is because a straight angle is formed when two rays point in exactly opposite directions, creating a straight line. In terms of geometry, you can visualize this as a line that divides a plane into two equal halves. When you measure the angle formed by these two rays, you find that it encompasses half of a full circle, which is 360 degrees. Therefore, a straight angle is represented by:
180 degrees = 360 degrees / 2
Understanding straight angles is important in many areas of math and science, especially when dealing with angles in various geometric figures or when analyzing movement along a straight path.