Question 149615


{{{C=2*pi*r}}} Start with the circumference of a circle formula



{{{C=2*pi*4.1}}} Plug in {{{r=4.1}}}



{{{C=25.76106}}} Multiply 2, {{{pi}}} and {{{4.1}}}  (you can use 3.14 for pi) to get {{{25.76106}}}




So the circumference of a circle with a radius of 4.1 meters is 25.8 meters (rounded to the nearest tenth)