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Vì điểm E nằm giữa 2 điểm D và C nên ta có
8 - 5,5 = DC hay DC = 3,5
Trong điểm D,C,E thì điểm C nằm giữa 2 điểm D và E
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d nằm giữa hai điểm còn lại k mình nhé
câu trl là b nhé bn :D
cách làm : ta có MA+AN=AM
mà M;A;N Cùng nằm trên đoạn thẳng MN
=>A nằm giữa M và N
=>đpcm