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mintnguyen263
2 năm trước
Cho tam giác ABC vuông tại A có AB = 3 cm, AC = 4cm, đường cao AH a) chứng minh tam giác ABH~CBA b) tính BC và AH c) gọi M, N lần lượt là hình chiếu của H trên AB và AC . I là trung điểm của BC. Chứng minh rằng AI vuông góc với MN Mai mk cần gấp nên mong mng giải đáp trong hôm nay Thanks mng nha😘😘
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