Question

Find the scale factor from Figure A to Figure B and the center of dilation for each figure.1.2BA1A

Answer 1

Scale factor also called similarity ratio is defined by the ratio between the lengths of the polygon sides:

Then, scale factor would be:

$SF=\frac{\text{length from figure B}}{\text{length from figure A}}$$\begin{gathered} SF=\frac{5}{2} \\ SF=2.5 \end{gathered}$

Scale factor is 2.5 units.