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 
Topics for APA paper are-
Branches of Psychology
Types of disorders and therapies
Human cognition
Human development
Famous Experiments
Historical figures for Psychology
Psychology Careers
Obesity in Children
Out of existing words change the ending or starting and something will happen....
Answer:
A Christmas tree?
Explanation:
My best guess, lol this is confusing