To determine the length of FG based on the information given (CH = 5 cm and CF = 13 cm), we need additional context about the relationship between the points C, H, F, and G.
Without any geometric figure or explanation of how these points relate to each other, it’s impossible to derive the length of FG directly from CH and CF.
If you have more context (like a triangle, a ratio, or a specific geometric figure), please provide that, and I would be glad to help you find FG!