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tranvanphap
2 năm trước
Cho tam giác MNP vuông tại M đường cao MI. Gọi Q,K lần lượt là chân đường vuông góc kẻ từ I đến cạnh MN và NP a. Tứ giác MQIK là hình gì? b. Gọi G là trung điểm của MI. CM : 3 điểm Q,G,K thẳng hàng c. Gọi H là trung điểm của IP. Qua H kẻ đường thẳng song song MI cắt MP tại E. Lấy điểm F đối xứng với E qua H. Tứ giác IEPH là hình thoi d. Biết NP = 15cm, MN = 9cm. Tính chu vi tứ giác IEPF
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