algebra

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The area of a circle is 78.5 square centimeters, and a subtending arc on the circle has an arc length of 6pi. The estimated value of is 3.14.
what is the measure of the angle subtended by the arc in degrees?

  • algebra -

    since a=πr^2 = 78.5 = 25π, r=5
    since s=rθ = 6π, θ = 6π/5 = 216°

  • algebra -

    11

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