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conmedung08032001
2 năm trước
Cho hình chữ nhật ABCD có AD = 8 cm , DC = 15 cm a) Tính AC . b) Đường thẳng đi qua D và vuông góc với AC tại M cắt AB ở điểm N và cắt tia CB ở điểm I . Tính DM. c) Chứng minh 2MDMN.MI d)Tính góc BMC
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