Circle A has center of (−2, 4) and a radius of 4, and circle B has a center of (3, 9) and a radius of 8. What steps will help show that circle A is similar to circle B?

Translate circle A using the rule (x − 5, y − 5).
Dilate circle A by a scale factor of 2.
Reflect circle A over the axis.
Rotate circle A 90° clockwise about the center.

Question

Circle A has center of (−2, 4) and a radius of 4, and circle B has a center of (3, 9) and a radius of 8. What steps will help show that circle A is similar to circle B?

Translate circle A using the rule (x − 5, y − 5).
 Dilate circle A by a scale factor of 2.
 Reflect circle A over the axis.
 Rotate circle A 90° clockwise about the center.

Mercury · Answer

thoughts? as a major hint, since circle A and circle B are not the same size (they have different radii), rigid transformations (in which the position, but not the size, of a shape is changed) won't show anything about their similarity.