Question

In the given figure O is the centre of the circle . find the value of X​

Answer 1

Answer:

construction join O to C

Step-by-step explanation:

1) since ob=oc (radius)

base angle OBC=OCB= 20°

ALSO OC=OA THIS IMPLIES OAC ANGLE=OCA angle =50°

this means angle ACB= 20°+50° = 70°

now we know from property angle subtended to the circumference from an arc of a circle is half of the angle subtended by the same arc to the centre ...

this implies angle x = 2×70° =140 respectively

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