pre calcalus

a circle with 4 inch radius, find length of arc when intercepted by central angle of 240 degrees

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  1. r=radius
    θ=central angle in radians
    To convert degrees to radians, multiply the number of degrees by π and divide by 180°.
    Arc length, l = rθ

    Example:
    θ = 90°
    =90*π/180=π/2
    r = 10 m
    Length of arc
    = rθ
    = 10 * π/2
    = 5π
    = 15.7 m

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  2. a circle has a radius of 4cm. Find the length of an arc subtended by a central angle of 150 degrees.

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