How would you write the name of a segment differently than the name of a line? what symbols would you use?

Explanation:

You can write both the name of a segment and the name of a line using two points; for the line, it is two points on the line; for the segment, it is the two endpoints of the segment.

The symbols we use are different for a segment and a line. Let the points on both the segment and the line be AB. For the segment, we draw a line segment (without endpoints or arrows) over the letters:

For the line, we draw a line with arrows at each end over the letters:

what's that