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Alonedie
2 năm trước
cho tam giác MNP vuông tại M, kẻ tia phân giác của góc MNP( D thuộc MP) kẻ DI vuông góc NP tại I. gọi giao điểm DI và MN là K . a, c/m: tam giác MND= tam giác IND b, c/m: PD=KD. so sánh MD và DP c, c/m: tam giác NKP cân d, c/m: ND vuông góc KP giúp mình vs
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