To calculate the circumference of a circle with a radius of 10 cm you have to apply the following formula:
[tex]C=2\pi r[/tex]Where
C is the circumference
r is the radius
π is the number pi
Replace the formula with r=10 and solve:
[tex]\begin{gathered} C=2\pi r \\ C=2\pi\cdot10 \\ C=20\pi cm \end{gathered}[/tex]The circumference of the circle is 20π cm.
