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What is the circumference of the circle above with center \(O?\)

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by Vincen » Mon Nov 09, 2020 7:15 am

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Circle.png
What is the circumference of the circle above with center \(O?\)

(1) The perimeter of triangle \(OXZ\) is \(20+10\sqrt2.\)
(2) The length of arc \(XYZ\) is \(5\pi.\)

Answer: D

Source: Official Guide
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