Question

find the scale factor and ratio of perimeters for a pair of similar octagons with areas 9ft^2 and 81ft^2

Answer 1

I don't really know the equation to use.

Answer 2

For similar figures, the ratio of similar sides is \[a:b\]
The ratio of similar areas would be \[a^2:b^2\] and volumes would be \[a^3:b^3\]
So use the second formula to be the ratio of the two given areas and that will help you find \[a:b\].

Answer 3

thank you @mww