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angle of arc/ angle of circle (360°) = length of the arc/ total circumference (2 pi* radius)

so you just have to find r then so:

angle of arc/ angle of circle (360°) *2pi = length of the arc/ radius

radius= ength of the arc/ angle of arc/ angle of circle (360°) *2pi

not that hard ;)

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Arc length = (x/360)*2 pi r

NB In radial terms 360 = 2 pi

Hence

Arc length = (x/2 pi) *2 pi r

Cancel down by '2 pi'

Hence

Arc length = x*r

Hence

r = Arc length / x

Where 'x' is the angular value in radians.

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lenpollock

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2y ago
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Q: How find radius in a circle given angle and length of arc?
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