thơ hay mà

ôi

?

a) Ta có :

AB=AM+MB

hay MB=AB-AM

MB=6-3=3 (cm)

b) Điểm M là trung điểm của đoạn thẳng AB vì:

+Điểm M nằm trên đoạn thẳng Ab

+Điểm M năm giữa hai điểm A và B (AM=MB=3 cm)

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