Mathematics, 25.07.2021 05:50 skylastrusz7643

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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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...