Diameter of the circle: 130/pi = 41.38 units rounded to two decimal places
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Circumference is Pi x Diameter so do Circumference divided by Pi to get the diameter :)
diameter = circumference/pi
Circumference = pi*diameter So diameter = circumference/pi = 1.59 units
circumference = diameter * pi. Therefore, diameter = circumference ÷ pi.
Yes because: circumference/diameter = pi and circumference = pi*diameter