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Trigonometry 5 Online
OpenStudy (anonymous):

The ratio of the radii of two circles is 4:5. What is the ratio of the circumferences of the two circles?

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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