Tools/raw materials: ruler, line segment

1. Prepare a ruler and a blank sheet of paper first. You can draw a line segment directly, or you can calculate and measure before drawing a line segment. The specific length of the line segment can be given directly. This number generally does not exceed 10 cm.

2. When drawing a line segment, the line segment has two endpoints. You need to draw an endpoint first, then measure it with a ruler according to the distance you want to draw. Then draw a line, and finally draw an endpoint. That's all.

3. First connect the two endpoints with a ruler, thus forming a line segment, and the distance between the two points is the length of this line segment.

4. A line segment can be represented by letters A and B. These letters are sometimes used to represent the length of the line segment, line segment BA or line segment AB, so A or B represents the two endpoints of the line segment.