Question

In the given figure AB//CD angle ABE=120 and angle ecd=100 and angle bec=a find the value of a(only see the above figure n ignore the other)

Answer 1

Answer:

<CEG = 80 degree. <BEF = 60 degree. ( sum of interior angles on same side of transversal). a+ 80 + 60=180. a= 180-140=40