Question

if the scale factor of Figure A to Figure b is 3:8 find the value of x

Answer 1

To find the scale factor you divide each side of triangle B into corresponding side in triangle A, as follow:

$\begin{gathered} \frac{\Delta B}{\Delta A} \\ \\ \frac{10}{25}=\frac{2}{5} \\ \\ \frac{8.6}{21.5}=\frac{2}{5} \\ \\ \frac{4}{10}=\frac{2}{5} \end{gathered}$

Then, the scale factor of figure B to figure A is 2:5 (Each 2units of triangle B correspond to 5 units in triangle A)