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trangkkk
2 năm trước
giúp mình giải bài này với ai giải đc mình hứa cho 5 sao bài 1 Gọi M là trung điểm của đoạn thẳng AB.Trên hai nửa mặt phẳng đối nhau có bờ là đường thẳng AB,ta lần lượt kẻ các tia Ax và By vuông góc với AB.Trên tia Ax lấy điểm P,trên tia By lấy điểm Q sao cho Ap=BQ.Chứng minh rằng ba điểm P,M,Q thẳng hàng câu 2 hai đoạn thẳng AB và CD cắt nhau tại trung điểm O của chúng. Chứng minh rằng: ΔABC= ΔBAD b nếu AC<AD thì AB không vuông góc với CD. Mọi người làm một bài cũng đc ạ trước khi làm nhớ xem đề kĩ nhé
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