If angle of arc is 60° and the length of arc is 20 cm. Find the radius of the circle from which arc is intercepted.

If angle of arc is 60° and the length of arc is 20 cm. Find the radius of the circle from which arc is intercepted. Correct Answer 19.09 cm

180 degree = π radian 1 degree = π/180 radians 60 degrees = 60* π/180 radians = π/3 radians Angle=Arc length/Radius π/3 = 20/Radius => Radius = 60/π = 19.09 cm.
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