Question

in the given figure , find the value of y ​

Answer 1

Answer:

y = 20°.

Step-by-step explanation:

30° + ? + 90° = 180° (Angles in one line)

? = 60°. So the angle between the 30° and 90° angles is 60°.

3y = 60° (Vertically Opposite Angles)

y = 20°.

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Answer 2

Answer:

20 degree

Step-by-step explanation:

let the angle AOC be x.

the sum of all angle on a straight line is always 180 degree.

So,90 +30+x=180

x=180-120

x=60 degree

x=3y (vertical opposite angle)

3y=60

y=20 degree