Question

The circumstance of a circle changes from 20 to 4 after a dilation. what was the scale factor of the dilation?

a. 1/25
b. 1/5
c. 5
d. 25​

Answer 1

Option B

Explanation:

The circumference of a circle changes from (pre-image)20 to 4(image) after a dilation.

`Scale\ Factor=(Circumference\ of\ image)/(Circumference\ of\ pre-image) \\\\Scale\ Factor=(4)/(20)\\\\Scale\ Factor=(1)/(5)`