题目如图,△ABC\triangle ABC△ABC中,CD⊥ABCD\bot ABCD⊥AB于点DDD,CD=BDCD=BDCD=BD,点EEE在CDCDCD上,DE=DADE=DADE=DA,连接BEBEBE.(1)(1)(1)求证:BE=CABE=CABE=CA；(2)(2)(2)延长BEBEBE交ACACAC于点FFF,连接DFDFDF,求∠CFD\angle CFD∠CFD的度数；(3)(3)(3)过点CCC作CM⊥CACM\bot CACM⊥CA,CM=CACM=CACM=CA,连接BMBMBM交CDCDCD于点MMM,若BD=12BD=12BD=12,AD=5AD=5AD=5,直接写出△NBC\triangle NBC△NBC的面积______.知识点：切线的判定章节：图形的性质 / 圆
