Answer:
the formula for calculating the circumference of a circle is:
[tex]2\pi \times r[/tex]
where r is the radius
or you can use this other formula:
[tex]\pi \times d[/tex]
where d is the diameter of the circle.
for your answer using the first formula
=2×pi×r
=2×pi×7
=43,98 m
your answer using the second formula
=pi×d
=pi×14
=43,98 m
any questions??