baraye in ke topic nakhabe majburam soale badi ro bezaram:
rasti baraye soale ghabli ham mitunid az menelaus berid va ham az mokhtasate (x,y) va agar kasi ham rahe hale ba mokhtasate (x,y) ro ehayanan nemidune chiye hatman beporse ....
khob soale badi :
tamime ghaziyey ceva ra esbat konid...