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iloveyoun1602
2 năm trước
Cho ΔABC cân ở A, AH⊥BC, HM⊥AB, HN⊥AC. a, CM : HM = HN. b, CM : MNCB là hình thang. c, Trên tia đối của tia NH lấy điểm E sao cho NH = NE. Trên tia đối của tia MH lấy điểm S sao cho MH = MS. CM : SENM là hình thang. mình mới lên lớp 8 nha
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