Question

a copy was made of Johns painting the copy resize the painting so that it measured 6in wide by 12 in long if the actual painting is 18 inches wide what is its length

Answer 1

To obtain the side l, compare the ratios of the two sides

$\frac{DC}{BC}=\frac{HG}{FG}$

$\begin{gathered} \frac{18}{l}=\frac{6}{12} \\ 6l\text{ = 18 }\times12 \\ 6l=\text{ 216} \\ l=\frac{216}{6} \\ l=36\text{ in} \end{gathered}$