in quadrilateral ABCD side AB Congress to site ad bisector of angle BAC cards side BC at P and bisector off the AC cut side BC at F prove that seg
EF parallel to seg BD .
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Step-by-step explanation:In ∆ABC,seg AE bisects the angle BAC
AC/AB=CE/BE......(1)..(property of angle bisector)
In ∆CAD ,seg AF bisects angle CAD
AD/AC=DF/FC....(2)...(angle bisector property)
Adding (1)and(2)
CE/BE=DF/FC ...(3)
In∆CDB
CE/BE=CF/FD
seg EF ||seg BD......(converse of basic proportionality theorem)
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