In order to select corresponding sides, we look at the figure to the side the ones that have the same amount of line.
In this case,
![\begin{gathered} SO=OP \\ LO=OX \\ XS=PL \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/iop9a6zcxl3w43whdrx80mftrw63tymyny.png)
Then, for the angles, we look for the vertex that are corresponding to each other.
![\begin{gathered} X=L \\ O=O \\ P=S \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/56mppd2anhbhkzhzeqg7e5zp7fb5bscjnm.png)
This means that triangles are congruent
![\Delta SOX=\Delta\text{POL}](https://img.qammunity.org/2023/formulas/mathematics/college/fy2b2mcyejq6nhrzedt63bkneyw4y2jcm7.png)