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14 May, 16:34

Arc CD is 2/3 of the circumference of a circle. What is the radian measure of the central angle?

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  1. 14 May, 19:52
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    A = 2/3 de 360

    A = 2*360/3

    A = 2*120

    A = 240º

    180º ... pi

    240º ... x

    18x = 24pi

    x = 24pi/18

    x = 24:6pi / 18:6

    x = 4pi/3 rad
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