because pi is equal to 3.1415926535... not 360
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if 360 degrees is equal to 2 Pi (3.14...) so 180 degrees is equal to 1 PI or just Pi
circumference = 4 pi, so arc is 4 pi x 75/360 = 300 pi /360 = 5 pi/6 = 2.62
A radian is an arc of a circle whose size is the same as its radius and in degrees it is about 57.3 degrees because there are 360 degrees around a circle and so 2*pi radians = 360 degrees. 2 pi = 360 degrees therefore 18 degrees = 2 pi x 18/360 radians = 0.1 pi radians
Arc length = 136*2*pi*r/360So r = 360*arc length/(136*2*pi) = 425.5 cmArc length = 136*2*pi*r/360So r = 360*arc length/(136*2*pi) = 425.5 cmArc length = 136*2*pi*r/360So r = 360*arc length/(136*2*pi) = 425.5 cmArc length = 136*2*pi*r/360So r = 360*arc length/(136*2*pi) = 425.5 cm
360