Question

in a given figure AB || CD,

Answer 1

angle BDC=x=40° (alternate angles)

In ABD,

75+x+y=180°

y=180-115

[y=65°]

[y-5=60°]

in BCD,

60+40+z=180°

z=180-100

[z=80°]

I hope its helpful ✌✌✌✌✌