Circle Similarity

What is the translation vector for Circle B to Circle A?

• <8, -4>
• <-4, 8>
• <-8, 4>
• <4, -8>

What is the dilation scale factor?

• 9/16
• 4/3
• 3/4
• 1

What is the translation vector of Circle B to Circle A.

• <-4, 1>
• <1, -4>
• <-1, 4>
• <4, -1>

What is the dilation scale factor?

• 3/7
• 7/3
• 5/7
• 7/3

Jake says “Two circles are always similar no matter what because you can map one onto the other using similarity transformations!!”  What transformations might he be referring to?

• Rotation & Translation
• Translation & Dilation
• Reflection & Dilation
• Dilation & Rotation

Two circles A and B have different radii.  A student dilates circle A at its center by a scale factor of 9/4 to make it the same size as circle B.  What scale factor could have been used to make circle B the same size as circle A?

• 3/2
• 2/3
• 4/9
• 9/4