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Mathematics, 19.08.2021 16:00 hannahpaige6347

Cho tam giác ABC có 3 góc nhọn và đường cao AH .Lây I đối xứng H qua AB, HI cắt AB tại M a)Chứng minh tam giác ABH= tam giác ABI
B) Lấy K đối xứng H qua AC . Chứng minh tam giác AKI cân
C) Chứng minh góc KAI = 2 góc BAC

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