Hey there!
The formula for circumference is πd, where d is diameter.
We are given that the diameter is 6, so the circumference is 6π.
However, we are asked for the approximate circumference, not the exact.
So, let's use 3.14 as π and simplify.
6 x 3.14 = 18.84
The approximate circumference of a circle with the diameter of 6 is 18.84.
Hope this helps!