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11 May, 13:06

What is the length of an arc with a central angle of 43? radians and a radius of 42 cm? use 3.14 for pi. round to the nearest hundredth, if necessary. enter your answer as a decimal in the box. cm?

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  1. 11 May, 17:01
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    L=R*angle, but the angle * must * be in radians. So, just translate 43 degrees into radians: 43 * pi / 180, and you'll get:

    L = 42 * (43 * pi / 180) ~ 31.504666, which rounded to the nearest hundredth is 31.50 cm.
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