Let's give you a detailed explanation of the closed path splitting into line segments.
Tutorial sharing:
1. First, open the software. Double-click it or right-click it.
2. After the software is opened, see the following figure,
3. File-create a file. In the new file dialog box, click OK to create a file without making any changes.
4. After creating a file, see the following figure,
5
Now you can draw a closed path at will, as shown in the figure,
6. Find and select the scissors tool, as shown in the figure,
7. Click on the closed path with the scissors tool, and then click a segment to split a line segment as shown in the figure.
All right, the above information is the detailed closed path split into line segments for users of Illustrator's software, I believe that you are very clear about the tutorials. I hope the tutorials above will help you.