Question

find the value of a,b,c,d

Answer 1

Answer:

a = 80 degree ( vertically opposite angle )

a = b ( adjacent angles)

b = 80 degree

the corresponding pair of angle b is the linear pair with angle d

Corresponding angles are equal

So 80 + d = 180 ( linear pair )

d = 180 - 80

d = 100

c = d ( corresponding angles)

c = 100