A circle with a radius of 4 in, is dilated by a scale factor of 5. What will be the circumference of the circle after dilation?
21 in
4 in
161 in
24 in
Ok so circumference=2*pi*radius. So We know that the radius is dilated by a scale factor of 5, so we can put 2*pi*20. For pi you can use So when we multiply 2*pi*20, you get 125.6637
