create polygon

[cairo9]

just like the boundary command in AutoCad, Can I automatically create a polygon within a space surrounded by six different lines.

Something like compose, where 'n' different lines can all be selected to form a closed polygon. but what do I do if they intersect.

Then this doesn't work, and I have to make a fresh polygon on my own.

please help.

[jan15]

Yes. There's a command called "Combine Into Surface" (in the "Tool" pull-down menu) which creates a new surface object whose boundaries are the nearest edges of all the selected objects.

It also leaves the original objects selected (I guess in case you want to create more than one surface object from the same set of boundary objects), but places the new object on top. So after creating it you have to deselect all and then select the surface object.

[Arch]

If all the lines have touching ends you can also use Tool>Compose when they are all selected which will turn them into a polygon.