concentric circles with center g have radii 5 and 11 as shown.

which would prove that the circles are similar?
dilate the smaller circle by a factor of ? (1).
if the circles were not concentric, what additional step would be needed to prove they are similar?
? (2) one of the circles so that the circles have the same center.
1 = a. 5/11 b. 11/5 c. 5 d. 11
2 = a. dilate b. reflect c. rotate d. translate