# State AAA similarity criterion.

Question:

State AAA similarity criterion.

Solution:

AAA Similarity Criterion: If two triangles are equiangular, then they are similar.

In ΔABC and ΔDEF, if

$\angle \mathrm{A}=\angle \mathrm{D}$

$\angle \mathrm{B}=\angle \mathrm{E}$

$\angle \mathrm{C}=\angle \mathrm{F}$

Then, $\triangle \mathrm{ABC} \sim \triangle \mathrm{DEF}$