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# Radians & Degrees

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The skateboard ramp in the picture is calles a quarter pipe. The curved surface is determined by the radius of a circle. Find the length of the curved part of the ramp.

(Use the formula $$S=\theta r$$ where $$S$$ is the arc length, $$\theta$$ is the angle measured in radians, and $$r$$ is the radius of the circle.)

AdamTaurus  Jan 16, 2018
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The length  is   just the quarter perimeter of a circle with a radius of  8 ft  =

S  =  r θ

(8) * pi / 2    =

4 pi    ft

CPhill  Jan 16, 2018