Question

find the valuee of x

Answer 1

the value of x is 20°

explanation

angle FEC+angle ECD= 180°. ( co. interior angles)

140°+angle ECD=180°

angle ECD= 180°-140°= 40°

now AB||CD and BC is transversal

angle ABC= angle BCD. ( alternatw int. angles)

angle BCD=60°

angle BCD=angle ECD + angle BCE

60° = 40° + x

x= 80° - 40°= 20°