# What is the difference between SSA and SAS?

**difference**is that in

**SAS**, the congruent angle is the one that is formed by the two congruent sides (as you see, the "A" is

**between**the two S), whereas with

**SSA**, you know nothing about the angle formed by the two

Subsequently, one may also ask, how do you tell if a triangle is SAS or SSA?

**SAS** stands for "side, angle, side" and means that we have two **triangles** where we **know** two sides and the included angle are equal. **If** two sides and the included angle of one **triangle** are equal to the corresponding sides and angle of another **triangle**, the **triangles** are congruent.

**shortcuts**allow students to know two triangles must be

**congruent**: SSS, SAS, ASA, and AAS. Knowing only side-side-angle (

**SSA**) does not work because the unknown side could be located in two different places.

Keeping this in consideration, what is the difference between AAS and ASA?

While both are the geometry terms used in proofs and they relate to the placement of angles and sides, the **difference** lies in when to use them. **ASA** refers to any two angles and the included side, whereas **AAS** refers to the two corresponding angles and the non-included side.

Same as the Angle Side Side Postulate (ASS) 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.