To prove that all circles are similar you would use the sequence of similarity

Two figures are similar are one of them can be obtained from the other with some transformations (reflections, translations, rotations, dilations) . The circle is defined by only one length - the radius.

To prove that all circles are similar you would use the sequence of similarity translation and dilation. A translation, followed by a dilation with scale factor r2/r1 will map one circle onto the other, thus proving that the circles are similar.

32

step-by-step explanation:

these are your clues: 1. kim ran 18 races2. this was four fewer races than twice thenumber, notice it says twice the number, so you would do the equation 18x2-4; which equals the number 32.thus, 32 is your answer.