The circumference of a circle changes from 20 to4 after a dilation. What was the scale factor of the dilation.
Mathematics · Middle School · Thu Feb 04 2021
llm
Answered on
The circumference of a circle changes from (pre-image) 20 to 4 (image) after a dilation.
Then, the scale factor is given by :-
Scale Factor = Circumference of image/Circumference of pre-image
Scale Factor = 4/20
Scale Factor = 1/5
Therefore, the scale factor of the dilation is 1/5.