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5 tháng 1 2020
a.C là trung điểm AB để CA=CB=1/2.AB b) Ngược lại câu a
21 tháng 2 2020

câu hỏi đâu bạn ?

21 tháng 2 2020

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

6 tháng 7 2016

sao kho vay mk cung dang can hoi

19 tháng 11 2017

ttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt

3 tháng 11 2015

Bài 1: V

Bài 2: A