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minhnguyentm78
2 năm trước
Giúp mk câu b ,c . lưu ý: chỉ cần gợi ý thôi .ko cần giải chị tiết Cho hình bình hành ABCD ,AB=8cm,BC=10cm .BD=6cm.trên AD và AB lấy lần lượt M,N sao cho AM=4cm,BN=3cm A,∆AMN~∆ABC(ko cần làm) B , MN vuông với BC C,BC cắt MN và DN lần lt tại I,K.Cm :IN/IM=KB/KC
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