Answer:
D. 2
Step-by-step explanation:
following the graph you can see that -2 on the x line comes across to 2 in y line
Area=pi times radius^2 so
if area=4pi=pi times r^2
4 times pi=r^2 times pi
divide both sdies by pi
4=r^2
square root
2=radius since legnth cannot be negative
radius=1/2 diamters
2 radius=diameter
2(2)=diameter=4
diameter=4
(2+4+6)*8 hopefully that's what you are looking for
