Question

please answer this question
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Answer 1

Answer:

100 + 120 + y = 360

220 + y = 360

y = 140°

We know

y = 2x

140 = 2x

x = 70°

Answer 2

Answer:

70°

Step-by-step explanation:

Use the theorem 'the angle subtended by an arc at the centre is double the angle subtended by it at any point on the remaining part of the circle'. (Theorem - 10.8), class 9 NCERT.

So,

100° + 120° + angle AOC = 360°

angle AOC = 360°- 120° + 100°

angle AOC = 140°

Also,

x = 1/2 × 140°

= 70°