Question

In Figure, OAB = 30° and OCB = 57°. Find BOC and AOC.
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Answer 1

As triangles OAB & OCB have their arm lengths equal to the radius of circle, these triangles are isosceles.

So, angles OBA=OAB=30

OCB=OBC=57

So, angle BOC= 180-2(57)=180-114=66

AOC=180-2(30)=180-60=120

Answer 2

Step-by-step explanation:

Hope the above solution helps:)