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[" In the adjacent figure."ABCD" is a pa...

[" In the adjacent figure."ABCD" is a parallelogram and line segments "AE],[" and "CF" bisect the angles "A" and "C" respecturely.Show that "AE|CF" ."],[[" Fist triangles "ADE" and "CBF" ,we have "AD=BC" ."AB=/_D," (AE ")" (IF."],[" and "/_DAE=/_BCF," IP "/_A=/_C=(1)/(2)Delta A=(1)/(2)C=/_DAE=/_BCF]],[" ADE a "/_CBF" And therefore "CD-DE=AB-BF" ."]

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