exact h.2.2.2 (Line u v) (Line_isLine this.ne12) (by simp [right_extend_mem_Line this])
V : Type u_1
inst✝² : MetricSpace V
u✝ v✝ w✝ : V
inst✝¹ : Finite V
inst✝ : Nontrivial V
x y z u v w : V
h : NotCollinear u v w
this✝ : dist u v + dist v w - dist u w ≤ 0
this : sbtw u v w
⊢ False
no goals