The formula to calculate radius is Pi x Diameter. So, if the radius is 7, the diameter is 14. Then, do 14 x pi (3.14) and your circumference will be 43.96
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21.99113 approximately... * * * * * Accurate to 5 decimal places but WRONG by a factor of 2. Circumference = 2*pi*radius so radius = 7 cm => circumference = 43.98 cm.
if you mean a radius of 5 units then the answer is 78.54 APEX
The equation for a circle is PiD. The diameter is double the radius, so it is 7 yards in this case. The circumference is 7*PI. Which is approximately 21.98.
perimeter or circumference = 2*pi*7 m
The radius is 7 rounded to the nearest integer The circumference works out as 44 rounded to the nearest integer.