[tex]\bf \begin{array}{ccllll}
sketch&poster\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
2&5\\
4&w
\end{array}\implies \cfrac{2}{4}=\cfrac{5}{w}\implies w=\cfrac{20}{2}\impliedby width[/tex]
[tex]\bf \begin{array}{ccllll}
sketch&poster\\
\textendash\textendash\textendash\textendash\textendash\textendash&\textendash\textendash\textendash\textendash\textendash\textendash\\
2&5\\
5&l
\end{array}\implies \cfrac{2}{5}=\cfrac{5}{l}\implies l=\cfrac{25}{2}\impliedby length[/tex]
