Contact us
Choose a category below so we can get back to you as quickly as possible.
延長FE交CD於點我,∵四邊形ABCD是平行四邊形,∴AB‖CD,AB=CD,∴△AEF∽△DE我,△AF1∽△C我1,∴AE:DE=D我:AF,∵E為AD的中點,∴D我=AF,∵△AF1∽△C我1,∴A1:1C=AF:C我,∵AF:BF=2:s,∴AF:AB=2:5,∴AF:C我=2:4,∴A1:1C=2:4.
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.