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Mathematics 7 Online
OpenStudy (anonymous):

How long is the arc subtended by an angle of 9π/5 radians on a circle of radius 30 cm?

OpenStudy (anonymous):

A) 9π B) 27π Eliminate C) 54π D) 108π

OpenStudy (anonymous):

forget the eliminate thing

OpenStudy (wolf1728):

arc length = radius * (central angle in radians) arc length = 30 * 9/5 * PI 169.6460032938 cm Here's a calculator to check your work: http://www.1728.org/radians.htm

OpenStudy (wolf1728):

Oh and the multiple choice answer is C) 54 PI

OpenStudy (anonymous):

Thank you!!

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