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Mathematics 11 Online
OpenStudy (erinweeks):

In circle O, mR = 23. Find mO. (The figure is not drawn to scale.)

OpenStudy (erinweeks):

OpenStudy (erinweeks):

A. 46 B. 23 C. 67 D. 157

OpenStudy (mathmate):

I suppose you mean mNRQ = 23, and you need to find mNOQ. Since both angles stem from the same chord NQ, R is on the circumference, then the angle at centre is double that on the circumference.

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