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(* Formalization of the Chou, Gao and Zhang's decision procedure.          *)
(* Julien Narboux (Julien@narboux.fr)                                      *)
(* LIX/INRIA FUTURS 2004-2006                                              *)
(* University of Strasbourg 2008                                           *)
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Lemma l_6_295 : forall A B C D F P Q R S,
on_foot F B A C ->
on_line D B F ->
is_midpoint P A B ->
is_midpoint Q B C ->
is_midpoint R C D ->
is_midpoint S D A ->
eq_distance S Q P R.