A diameter of the circle is shown.

Circle with diameter 18 feet

What is the exact circumference of the circle?

Question 2 options:



18π

36π

81π

The circumference of a circle is found by multiplying its diameter by π (pi), which is approximately 3.14159.

In this case, the diameter of the circle is 18 feet.

Therefore, the exact circumference of the circle is:
18π