Definition CongruentStrictTriangles (A B C A' B' C' : Point) :=
	CongruentTriangles A B C A' B' C' /\
	~Collinear A B C.

Lemma CongruentStrictTrianglesSASA : forall A B C A' B' C' : Point, Distance A B = Distance A' B' -> Distance A C = Distance A' C' -> Angle B A C = Angle B' A' C' -> ~Collinear A B C -> CongruentStrictTriangles A B C A' B' C'.