Question

what is the value of x in given circle. ​

Answer 1

Answer:

the angle substended in the centre is twice the angle substented by it in any part of the remaining circle,therefore,

angle AOB =2 times of angle ACB

angle AOC =2×40°

angle AOC =80°

hope it helps u...✌

Answer 2

Theorem angles subtended to the center is twice the angle subtended by the same arc to the circle

in the given figure

arc AB subtend an angle AOB to the center and also angle ACB to the circle

so by the given theorem

AOB=2 x ACB

X =2x 40 degree

so X=80 degrees

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