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02-01-2020
Mathematics

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any help appreciated <333

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02-01-2020

Answer:

A. 67°

Step-by-step explanation:

Since AC is tangent to the circle, ∠C must be 90°.

You know all angles of a triangle should add up to 180°, so with A given as 23°, that leaves 180-90-23 = 67° for O.

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