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Angle A is circumscribed about circle O. What is the measure of angle ∠O? A. 70 B. 65 C. 130 D. 50

Angle A is circumscribed about circle O. What is the measure of angle ∠O? A. 70 B. 65 C. 130 D. 50
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Angle A is circumscribed about circle O. What is the measure of angle ∠O?

A. 70

B. 65

C. 130

D. 50

Angle A is circumscribed about circle O. What is the measure of angle ∠O? A. 70 B-example-1
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User Schnaader
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Answer:

angle o = 2×angle D (central angle twice inscribed angle)

angle a= angle d = 65

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User Studds
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