Question

find x if ab || cd
A) and B) both

Answer 1

Draw line EF||AB||CD in both the figures through X(name the point X where there is the angle of x°)
Naming the upper part X1 and lower part X2 in both the figures

a) 45° = X1 (alternate int. angles)
and similarly X2=40°

X = 45+40
X = 85°

b)130+X1= 180°(co. int. angles)
X1=50°
similarly
X2+120=180°
X2=60°

X=X1+X2
X=110°

Answer 2

a) 85 degrees
b) 110 degrees