Reciprocal of 2pi = 1/(2pi) = 0.159155(rounded)
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Let pi=3.14 So: 2(3.14) -> 2(3.14)=6.28 Therefore: 2pi=6.28
Area of a circle = 2pi*r2 = 2pi*(4.2)2 = 110.84
it is the formula of circumference of circle
The circumference of a circle C is 2Pixr So solving for r we have C/2Pi=r
To convert degrees to radians, you need to multiply the degree measure by 2pi/360Multiply 70 by 2pi/360 and you get approximately 1.22173047.