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tiensi04011999
2 năm trước
Cho hình bình hành MNPQ, MP<NQ, vẽ PE vuông MN tại E,PE vuông MQ tại F,NH vuông MP tại H. a.C/m: MN.ME=NP.NH b.C/m: tam giác PNH đồng dạng tam giác MPE c.C/m:MQ/MN=EP/PF
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