已知:梯形ABCD,DC‖AB,在下底AB上取AE=EF,连接DE,CF并延长交于点G,AC与DG交于点M,求证DG×ME=EG×DM
证明:∵DC‖AB
∴△AME∽△CMD,△EFG∽△DCG
∴ME/DM=AE/DC=EF/DC=EG/DG
∴ME/DM=EG/DG
∴DG×ME=EG×DM
已知:梯形ABCD,DC‖AB,在下底AB上取AE=EF,连接DE,CF并延长交于点G,AC与DG交于点M,求证DG×ME=EG×DM
证明:∵DC‖AB
∴△AME∽△CMD,△EFG∽△DCG
∴ME/DM=AE/DC=EF/DC=EG/DG
∴ME/DM=EG/DG
∴DG×ME=EG×DM