Hello, friends! We learned that the ray is a line segment wjth a beginning point to an endless point. So it extends from one direction only. But what happens if the line segment extends from two directions? If the line segment extends from two directions to an endless point and we can't measure its length, it's called a straight line. And a straight line like, this, AB or BY and a small line with two arrows above it. My friends, I hope you learned the difference between the line segment, the ray, and the straight line.