Examining the diagram, we see that AC and DF have the same length as AB and DE. Therefore, we have two pairs of congruent sides. We also see that angles ∠ CAB and ∠ FDE have the same measure, which makes them congruent too.
We have two sides and the included angle in △ ABC that are congruent to corresponding parts in △ DEF. Therefore, by the Side-Angle-Side (SAS) Congruence Theorem △ ABC and △ DEF are congruent. Let's show this as a flowchart.
