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camcana16102002
2 năm trước
Trên tia Ax lấy các điểm B, C sao cho AB = 4 cm, AC = 8cm a) Trong ba điểm A, B, C điểm nào nằm giữa hai điểm còn lại? Vì sao? b) Chứng tỏ B là trung điểm của đoạn thẳng AC c) Gọi D là trung điểm đoạn thẳng AB. Tính độ dài đoạn thẳng DC. Giúp mik vs mn ơi !! 5*
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