Given:
The objective is to find whether the two triangles are similar or not with explanation.
The given triangles can be represented as,
From the given figure, the sides AB = AC = 13.5 and the sides DE = DF = 7.5.
For two triangles to be similar, the ratio of their adjacent sides should be equal.
The ratios are,
[tex]\frac{AB}{DE}=\frac{AC}{DF}=\frac{BC}{EF}[/tex]Now, apply the given values in the above ratio.
[tex]\begin{gathered} \frac{13.5}{7.5}=\frac{13.5}{7.5}=\frac{9}{5} \\ 1.8=1.8=1.8 \end{gathered}[/tex]Thus, the ratios of sides of the two triangles are similar.
Hence, the two triangles are similar triangles.