Answer:
20π m or 62.83 m
Explanation:
The formula for Circumference is C = 2πr
All you need to find for the formula is the radius, which is half of the diameter.



Then plug the radius into the formula and solve for Circumference


or 
Study every day and download apps like doulingo. It worked for me and I used to have disorders too.
filipino:
taglay ang matibay na kongklusyon
translate to english:
with a strong conclusion
<em>hihi :) i am filipino !</em>
hindi sigurado kung ito ang sagot sa iyong katanungan ngunit narito ka !
hope this helps :)
<em>-audrey <3</em>