Aaron says that all

cones with a base circumference of 8 inches

will have the same surface area. Is Aaron correct?

NO

Step-by-step explanation:

Look at the figure attached below, we know that the area of the cone is the sum of area of circle part and cone part of the figure.

to find the surface area of the cone, first measure the radius of the base and find the area of the circle part by  formula . Then measure the side (slant height) length of the cone part and find the area of the cone part by the formula .

Now the surface area of the cone is circumference of the circle plus area of the cone part.

i.e.

From the above discussion we concluded that surface area of the cone does not depend only on the circumference of the base but also we need side length of the cone part as well thus all  cones with a base circumference of 8 inches  will not have the same surface area.

i think it might be a but you might want a second opinion