Angle-Angle-Angle conditions for proving triangles are congurent

[AngelShare]

Why is there not an Angle-Angle-Angle (AAA) condition for proving triangles are congruent?

Is it because, in congruent polygons, the corresponding angles and corresponding sides are equal? If there were an A-A-A method, the corresponding angles would be equal but the sides wouldn't necessarily be equal?

 

[AngelShare]

Never mind, I found what I needed http://psychcentral.com/psypsych/Similar .