do I have to save as RTF? or will it read on the pc?
You need to save as a format the PC can read. The native Pages format can't be read directly on a PC, but can be unzipped and its text retrieved.
You can Export to word, Pdf or Rtf.
There is no Pages application on PCs. So therefore nothing to open .pages files.
As fruhulda suggests export to formats that can be read on PCs:
Menu > File > Export > Word/PDF/RTF/TXT
Retrieving data ...