Question

The radius of a circle is 1 millimeter. What is the circle's circumference?

Answer 1

Answer:

C = 2pi mm or approximately 6.28 mm

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi * r

C = 2 * pi *1

C = 2pi

We can approximate pi by 3.14

C = 2*3.14

C =6.28 mm

Answer 2

Answer:

The circle's circumference is 2 pi ml

Step-by-step explanation:

The formula for the circumference of a circle is 2$\pi$r, or diameter times pi.

In this case, we simply plug into the equation. Using the formula 2$\pi$r, we get 2(1)$\pi$, or 2$\pi ml$