# Are pairs of triangles similar?Given information:12210202771.jpg

Are pairs of triangles similar?
Given information:

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Calculation:
In $\mathrm{△}ABC\phantom{\rule{1em}{0ex}}\text{and}\phantom{\rule{1em}{0ex}}\mathrm{△}DEF$
$\mathrm{\angle }BAC=\mathrm{\angle }DEF$ (Given)
$\mathrm{\angle }ACB=\mathrm{\angle }EDF$ (Vertically opposite angle)
$\mathrm{\angle }BAC=\mathrm{\angle }DFE$ (By properties of triangle)
$\mathrm{△}ABC\phantom{\rule{1em}{0ex}}\text{and}\phantom{\rule{1em}{0ex}}\mathrm{△}DEF$ are similar.