[tex]\bf \stackrel{\textit{triangles are similar by \underline{Proportional Parts of Similiar Triangles}}~\hspace{10em}}{\cfrac{12}{30}\implies \cfrac{2}{5}~\hfill \cfrac{7}{17.5}\implies \cfrac{2}{5}~\hfill \cfrac{14}{35}\implies \cfrac{2}{5}}[/tex]
