Answer:
A.
2 x 2 = 4 so 4 is the diameter because the diameter is double the radius
diameter x pi = circumference
4 x pi = 3pi or 12.56
8 x pi = 8pi or 25.12
Step-by-step explanation:
Answer:12.57
C=2πr
=2·π·2
=12.56637
Answer: 54 degrees