Diameter goes across the whole circle, and Radius is halfway
I hope this helped
Answer:
Undefined terms
Step-by-step explanation:
In Geometric system, points, lines, and planes belong to the category of undefined terms. These systems do not have definite shape and sizes.
Point is used to define a location. Lines and planes are extend infinitely.
Hope this will help you. :)

I could do that because both numbers are divisible by 7, and then they are divisible by 2. You could also have divided them by 14, but I think it's easier to do and explain this way.
Answer:
66.3720930233
Step-by-step explanation: