Question: A circle of diameter 2 in. is dilated using a scale factor 3. What is the diameter of the enlarged circle?

A ) 9
B ) 8
C ) 7
D ) 6

Steps to derive

1 Diameter of the enlarged circle = diameter of the original circle x scale factor

 [Substitute values and simplify.]
2 2 in. x 3 = 6 in.

3 The diameter of the enlarged circle is 6 in.



Hence the right answer is Option D

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