Lines from a Triangle

Geometry Level 4

Triangle ABCABC has a right angle at CC. DD lies on the same side of ABAB as CC, with BAD=90 \angle BAD = 90^\circ and AD=ABAD=AB. EE is the foot of the perpendicular from BB to DCDC. FF is a point on EBEB such that FAC=90\angle FAC = 90^\circ. What is the measure (in degrees) of FCBFCB?

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