#### What about SSA (Side Side Angle) theorem?

If two triangles have two congruent sides and a congruent **non included **angle, then triangles are NOT NECESSARILLY congruent. This is why there is **no Side Side Angle (SSA)** and there is **no Angle Side Side (ASS)** postulate. The way that many people remember this fact is that the ASS postulate would be the name for a donkey! (ASS) And there is no postulate named after a donkey!

However, if you would like a picture to illustrate why there is no ASS or SSA postulate look at the two triangles below.

As you can see, even though side BC = BD , this side length is able to swivel such that two non congruent triangles are created even though they have two congruent sides and a congruent, non included angle. (SSA)

ABC ABD

The two triangles are NOT congruent