To calculate the circumference, we need to use a formula.
The formula for circumference: 2 r
Or in other words “circumference= 2 x x r
The “r” is radius.
In the photo, I see you are given the diameter. Which is 10/. The radius is just half of the diameter, so you can just divide 10/ by 2.
Then, using the formula, use your calculator and type in “2 x x (whatever 10/ divides by 2 is).
Now, you have your answer!!
P.s your answer should be 10cm.