Two triangles are similar if their sides are proportional. We need to make the correspondance depending on the size, both bigger sides, etc.
[tex]\begin{gathered} \frac{27}{8}=3.375 \\ \frac{20}{5}=4 \\ \frac{8}{4}=2 \end{gathered}[/tex]
Since these three quotients are not equal, then the two triangles are not similar.
Note that both triangles share one side.
