no goals
ι : Sort ?u.141835
𝕜 : Type u_2
E : Type u_1
inst✝² : LinearOrderedField 𝕜
inst✝¹ : AddCommGroup E
inst✝ : Module 𝕜 E
s t u : Set E
x y a b c : E
⊢ convexJoin 𝕜 (segment 𝕜 a b) {c} = ↑(convexHull 𝕜).toOrderHom {a, b, c}
rw [← pair_eq_singleton, ← convexJoin_segments, segment_same, pair_eq_singleton]