Q. 34.8( 6 Votes )
In Fig. 16.122, O is the centre of the circle. Find ∠BAC.
∠AOB = 80o
∠AOC = 110o
∠AOB + ∠AOC + ∠BOC = 360o (Complete angle)
80o + 110o + ∠BOC = 360o
∠BOC = 170o
By degree measure theorem,
∠BOC = 2 ∠BAC
170o = 2 ∠BAC
∠BAC = 85o
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