To find the coordinates of vertex C' after reflecting vertex C over a vertical line, we need to determine the vertical line of reflection and the original coordinates of vertex C.
Each point on the left side of the line will have its coordinates adjusted accordingly to mirror across the line.
If you provide the coordinates of vertex C and the vertical line of reflection (e.g., x = k), I can help you calculate C' accurately based on the reflection properties.
Please share the relevant details!