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nguyenthibaoanh
2 năm trước
Cho tam giác ABC có AB =AC = 4 cm . BC=10 cm. Kẻ đường trung tuyến AM từ điểm M. Kẻ MH và MK vuông góc với AB và AC a) chứng minh : tam giacs ABM =ACM b) tính AM c) so sánh :MH và MC d) chứng minh AM là đường trung trực của HK Cảm ơn :)
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