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thaytt1978
2 năm trước
Các bạn giỏi toán giúp mk với ạ ! Bài 5: Cho điểm O thuộc đường thẳng xy. Trên tia Ox lấy điểm A sao cho OA = 3cm, Trên tia Oy lấy điểm B,C sao cho OB = 9cm, OC = 1cm a) Tính độ dài đoạn thẳng AB; BC. b) Gọi M là trung điểm của đoạn thẳng BC. Tính CM; OM
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