For naming a segment, we have to know its extrem points. If those extreme points are A and B, we name the segment as:
![\bar{AB}](https://img.qammunity.org/2023/formulas/mathematics/college/d72ghty4pdf06h1hcetw0hobzazj0z32tq.png)
We are going to take as an example the segment with extreme points I and C, shown at the left above part of the image, so its name will be:
![\bar{IC}](https://img.qammunity.org/2023/formulas/mathematics/college/vkaet0nu5gb7h7j0g45bxeizurxehjwiso.png)