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tuanquang
2 năm trước
cho đoạn thẳng AB=6cm. Lấy 2 điểm C và d thuộc đoạn thẳng AB sao cho AC=DB và cùng =2cm. a, Tính độ dài CD b, Gọi M là trung điểm đoạn thẳng AB GIải thích vì sao M cũng là trung điểm đoạn thẳng CD c, tìm trên hình vẽ những điểm khác cũng là trung điểm của đoạn thẳng
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