"If the three sides (SSS) of a triangle are proportional to the corresponding three sides (SSS) of another triangles, then their corresponding angles (AAA) are equal".
In \[ \Delta les \] ABC and DEF
if \[\frac{AB}{DE}=\frac{BC}{EF}=\frac{AC}{FD}\]
then \[B\hat{A} C=E\hat{D} F\]
\[A \hat{B} C=D \hat{E} F\]
\[B\hat{C}A=E\hat{D} F\]
i.e., \[ \Delta les \] are equiangular.
