4. Used a Scale factor of ⅔ to dilate a circle with radius of 18cm. What is radius or original circle?

Answer 1

To determine the radius of the original circle, we need to multiply the scaled radius by the reciprocal of the scale factor.

The scale factor is ⅔, so the reciprocal is 3/2.

Therefore, the radius of the original circle is:
18 cm * (3/2) = 27 cm