Question

In the given figure, line l is parallel to BC. find the values of a, b and c. Write proper reasons.​

Answer 1

sum of all the angles is equal to 180°

so when we add

45+55+b=180

100+b=180

b=180-100

b=80

oppsite angles are equal

c=55°

a straight line is equal to 180

55+80+a=180

130+a=180

a=180-130

a=50