Is the polygon similar? If so, by what rule?
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[tex]\bf \stackrel{\textit{\Large sides}}{\stackrel{left}{\cfrac{10}{30}}=\stackrel{top}{\cfrac{12}{36}}=\stackrel{right}{\cfrac{10}{30}}=\stackrel{bottom}{\cfrac{2}{6}}}\implies \stackrel{\textit{same ratio}}{\cfrac{1}{3}}\qquad \textit{\Large similar figures~~\checkmark}[/tex]