N
nhuchonhu


Day la bai toan lop 7
cho 2 doan thang AB va CD cat nhau tai I sao cho I la trung diem AB va CD.
a).chung minh: AC = BD; AD //CB.
b).Tren AD lay M, tren CB lay N sao cho AM = BN.
Chung minh :M,N,I thang hang
Moi nguoi tra loi xong minh xin thanh!:-SS
>-@};-
cho 2 doan thang AB va CD cat nhau tai I sao cho I la trung diem AB va CD.
a).chung minh: AC = BD; AD //CB.
b).Tren AD lay M, tren CB lay N sao cho AM = BN.
Chung minh :M,N,I thang hang
Moi nguoi tra loi xong minh xin thanh!:-SS