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What is the length of the circular arc intercepted by a central angle of 20degrees in a circle with a radius of 5cm?

  • trig -

    your arc length is 20/360 or 1/18 of the circumference.
    The circmf = 2π(5) = 10π

    so the arc length = (1/18)(10π) = 5π/9 cm

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