V?y khi k thay ??i thì trung ?i?m c?a PQ luôn thu?c ???ng th?ng c? ??nh ?i qua trung ?i?m c?a AB và DE.(start array l A subset B Leftrightarrow forall x in the Rightarrow x in BA notsubset B Leftrightarrow exists x in a very Rightarrow x notin Bstop array )T?t C?two hundred ?? Thi Th? T?t Nghi?p THPT 2025 L?ch S?L?ch S? L?p 12L?ch S? L?p 11L?ch