Question

in figure (10.53) if AC parallel DE, then find the value of x​

Answer 1

Answer:

angle EDC and angle DCA are alternate angles

EDC=DCA

55°=DCA

DCA=55

Now DCA and BCA are linear pair of angles

DCA+BCA=180°

55+X=180°

X=180-55

=125°

Answer 2

angle FCB+angle ACB =180°

so angle ACB= 125°