‘O’ is the circumcentre of triangle ABC. If ∠ BAC

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‘O’ is the circumcentre of triangle ABC. If ∠ BAC = 50° then ∠ OBC is

1. 50°
2. 100°
3. 130°
4. 40°

Correct Option: D

According to question , we draw a figure of triangle ABC whose O is the circumcentre

∠BAC = Angle at circumference = 50°
∠BOC = angle at centre = 2∠BAC = 100°
OB = OC = radius

∴ ∠OBC = ∠OCB =	80°	= 40°
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