Pi is a series of unending decimals after a 3. The first one hundred digits of pi are: 3.14159265358979323846264338327590288419716939937510582097494459230781
64062862989986280348253421170679
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1 rad = 180°/pi Example: 1.6 rad = 1.6(180°/pi) 1.6 rad = 2880°/pi
circumference = 2*pi*radius or diameter*pi
Pi is not a size. Pi is usually 22/7. Sometimes also 3,14. Pi is used to measure area and circumference of a circle, and the volume of sphere / tube. If there is no pi, then the area and circumference of circle, and the volume of sphere / tube will not be counted.
pi
Degrees = (180/pi)*Radians