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March 30, 2017

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Find the radius of a circle with a central angle of pi/7 and a length of the intercepted arc equal to 7.7 cm. Round your answer to the nearest tenth.

  • Math/Trig - ,

    L=r*aplha
    alpha in radians

    L=7.7
    alpha=pi/7

    7.7=r*(pi/7) divide with (pi/7)
    r=7.7/(pi/7)
    r=(7.7*7)/pi
    r=53.9/3.1415926535
    r=17,1569cm
    r=17.2cm

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