# Are f and g parallel?

- Author:
- Zoltán Kovács

Segments

*f*and*g*are constructed as seen above in the figure. Are they parallel? They seem to be. In fact, it depends on how we the intersection points*C*,*D*and*E*,*F*define. If we swap*C*and*D*, for example, then the statement is no longer true! This is the reason why the statement "*f*and*g*are parallel" is true just on parts.