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tri101265
2 năm trước
. Cho tam giác MNP có NP = 29 cm, MN = 20 cm và MP = 21 cm. a. Chứng minh tam giác MNP là tam giác vuông. b. Vẽ MH vuông góc với NP tại H. Trên tia đối của tia HM, lấy điểm E sao cho H là trung điểm của ME. Chứng minh rằng ΔNMH =ΔNEH. d. Chứng minh NE vuông góc với PE
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