The circumference 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
2 answers
um, try 4/20
B. 1/5
A. 1/25
B. 1/5
C. 5
D. 25
2 answers