If you use a scale factor of 15 to create a circle with radius 18 cm, what is the radius of the original circle you dilated?
1.90 cm
2.180 cm
3.9 m
4.3.6 cm
To find the radius of the original circle, we need to divide the radius of the dilated circle by the scale factor.
So, if the scale factor is 15 and the dilated circle has a radius of 18 cm, the radius of the original circle can be found by dividing 18 cm by 15.
18 cm / 15 = 1.2 cm
Therefore, the radius of the original circle is 1.2 cm.