Please see the link
http://www.allaboutcircuits.com/vol_3/chpt_4/10.html
On this link under voltage divider bias, the description of second set of diagrams reads as under:
Thevenin's Theorem converts voltage divider to single supply Vth and resistance Vth.
Correction: I think Vth at the end of the sentence should be Rth.
Regards
Sajid
http://www.allaboutcircuits.com/vol_3/chpt_4/10.html
On this link under voltage divider bias, the description of second set of diagrams reads as under:
Thevenin's Theorem converts voltage divider to single supply Vth and resistance Vth.
Correction: I think Vth at the end of the sentence should be Rth.
Regards
Sajid