题目如图,直线ADADAD,BCBCBC交于点O,ABO,ABO,AB∥EFEFEF∥CDCDCD,若AO=5AO=5AO=5,OF=2OF=2OF=2,FD=3FD=3FD=3,则BEEC\frac{BE}{EC}ECBE的值为______.知识点：圆的综合题章节：图形的性质 / 圆
如图,直线,交于点∥∥,若,,,则的值为______.如图,直线,交于点∥∥,若,,,则的值为______.如图,直线,交于点∥∥,若,,,则的值为______.