exact hQA₁ _ cfg.sbtw_Q_A₁_Q₁.right_mem_affineSpan
V : Type u_1
Pt : Type u_2
inst✝³ : NormedAddCommGroup V
inst✝² : InnerProductSpace ℝ V
inst✝¹ : MetricSpace Pt
inst✝ : NormedAddTorsor V Pt
hd2 : Fact (finrank ℝ V = 2)
cfg : Imo2019q2Cfg V Pt
hQ : cfg.Q ∈ affineSpan ℝ {cfg.C, cfg.B}
hQA₁ : ∀ p ∈ affineSpan ℝ {cfg.Q, cfg.A₁}, p ∈ affineSpan ℝ {cfg.C, cfg.B}
⊢ cfg.Q₁ ∈ affineSpan ℝ {cfg.C, cfg.B}
no goals