If CFE =144 degrees
then BFE = 180 -144 =36 degrees (sum of angles on a straight line)
CEF = 36 Degrees ( alternate angles) or
CEF = 360 - (90+90+144) = 36 ( sum of angles in quadrilateral CDEF)
If ABE = 30 degrees, then EBF = 90 - 30 = 60 Degrees ( angles at the edge of a triangle is 90 degrees)
In triangle BEF, = 60 + 36 + < BEF = 180
