Question

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Answer 1

Answer:

180-80=100°

so angle ACB is 100°

Step-by-step explanation:

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Answer 2

Answer is 40°

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∠ AOB = 80°

We know that angle made on center = 2 × angle made on circumference

⇒ ∠ AOB = 2 × ∠ ACB

⇒ 80 = 2 × ∠ ACB

⇒ ∠ ACB = 40°

Thus the angle ACB = 40°

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