Question

In the given figure, find the value of y.

Answer 1

y=20

Explanation:

since angles on a straight line =180°

and we are given half of the line(90°)

so we know we are left with another 90°

the angle opposite 30=30 because. opposite angles r equal

so then we now have the equation

180=(90+30)+3y

180=120+3y

180-120=3y

60=3y

dividing by 3

y=20