Final answer:
A rotation transformation can be used to prove that ABC is similar to ADE by AA similarity postulate.
Step-by-step explanation:
In order to prove that ABC is similar to ADE using the AA similarity postulate, we need to show that angle a is congruent to angle a by the reflexive property, and then show that the corresponding angles of the two triangles are congruent. Since angle a is congruent to itself by the reflexive property, we can use a rotation transformation to prove that the two triangles are similar.