butterfly134
butterfly134 butterfly134
  • 25-07-2021
  • Mathematics
contestada

cho tam giác ABC. gọi M,N lần lượt là trung điểm AB,AC trên tia đối của tia NM lấy điểm D sao cho N là trung điểm MD, chứng minh
a, CD song song AM
b, CD = MB
d, tam giác BMC= tam giác DCM
e, MN= 1/2 DC

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name666
name666 name666
  • 25-07-2021

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