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nguyenhoaianhhog
2 năm trước
Vẽ đoạn thẳng AB = 20cm có điểm C nằm giữa hai điểm A và B sao cho AC – CB = 10cm. a) Tính độ dài AC, CB. b) Lấy điểm M thuộc AB sao cho C là trung điểm của đoạn thẳng BM. Tính BM. c) Chứng minh M là trung điểm của đoạn thẳng AB.
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