Question

 Can Anyone Help? 
 I don't get this


there's a big circle with a line in the middle and on top of that line there is a 12 (circle A)
now there's also a small circle that has a line in the middle that has a 8 on it (circle B)

QUESTION 1 - What is the diameter of circle A
QUESTION 2 - What is the diameter of circle B
QUESTION 3 - What is the radius of circle A 
QUESTION 4 - What is the radius of circle B 

Answer 1

The diameter of the circle is the line that reaches across the whole circle
QUESTION 1 - What is the diameter of circle A
diameter of circle A is 12
QUESTION 2 - What is the diameter of circle B
diameter of circle B is 8

Now, the diameter is twice the radius
d = 2*r
QUESTION 3 - What is the radius of circle A 
so given in circle A the diameter is 12 then the radius is 6
QUESTION 4 - What is the radius of circle B
given in circle B the diameter is 8 then the radius is 4

Hope this helps :)