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phivan111
2 năm trước
Cho tam giác ABCvuông tại A ( AB < AC). Gọi E là trung điểm của AB. Từ E lần lượt kẻ đường vuông góc với AB tại F. a) CM tứ giác ADEF là hình chữ nhật b) Gọi K là điểm đối xứng của E qua F. CM tứ giác AEBK là hình thoi c) Qua D vẽ đường thing vuông góc với BC cắt AB tại M. Đường thing vuông góc với AC tại C cắt MD tại I. CM tứ giác MCIA là hình bình hành d) Ching Minh BD vuông góc với AI MÌNH CHỈ CẦN CÂU D AI GIÚP MÌNH VỚI !!
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