Please solve the question below
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Step-by-step explanation:
∠BOC = 360° - (∠AOB + ∠AOC)
= 360° - (100°+120°)
= 360° - 220°
= 140°
Since The angle subtended by a arc at the centre is double the angle subtended by any point on the remaining part of the circle with cente. (thm)
∠A = 1/2 ∠BOC = 1/2 x 140° = 70°
∠B = 1/2 ∠AOC = 1/2 x 120° = 60°
∠C = 1/2 ∠AOB = 1/2 x 100° = 50°
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