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Trigonometry
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OpenStudy (anonymous):
The ratio of the radii of two circles is 4:5. What is the ratio of the circumferences of the two circles?
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OpenStudy (anonymous):
circumference is 2(pi) r so whatever the ratio will be of radii same will be of the circumference
OpenStudy (welshfella):
both the radii and circumference are one dimentional so the ratio will be the same
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