Question

Circle A has been enlarged to create circle B. Circle A's circumference was 8. Circle B has been enlarged to circumference 28. What scale factor was used to create circle B?

Answer 1

The scale factor 7:2 was used to create circle B.

Explanation:

Given:

Circumference of Circle A = 8

Circumference of Circle B = 28

We need to find the scale factor which was used to create circle B.

Solution:

To Scale factor we will Divide Circumference of Circle B with Circumference of Circle A.

framing in equation form we get;

Scale factor =
`(28)/(8) = (7)/(2)`

Hence The scale factor 7:2 was used to create circle B.