Someone told me if I answer a question I can watch videos to unlock my answer sorry
Answer: your obviously going to need to use the method a2+b2=c2
Try to calculate the radius if not given to you.
Step-by-step explanation:
Answer/Step-by-step explanation:
A. 
Using b = 2

Using b = 4

Using b = 6

Using b = 8

Using b = 10

Using b = 2

B. 
Using x = 3

Using x = 5

Using x = 7

Using x = 9

Using x = 11

Using x = 13

C. 
Using a = 2

Using a = 3

Using a = 4

Using a = 5

Using a = 6

Using a = 7

D. 
Using y = 2

Using y = 3

Using y = 5

Using y = 10

Using y = 8

Using y = 6

Answer:
Not sure what more you need, but here is an example of the graph on Desmos.