figure a: 4ft and 9ft figure b: 12ft and 27ft

Question

figure a: 4ft and 9ft figure b: 12ft and 27ft

Which scale factor has been applied to figure A to produce figure B?

If a scale factor of 2 is applied to figure A, which of these would be a corresponding side length on the new triangle?

Answer 1

figure a: 4ft and 9ft figure b: 12ft and 27ft

If a scale factor of 3 is applied to figure A, which of these would be a corresponding side length on the new triangle?