Question

Picture below

Answer 1

The two triangles share a side. By the reflexive property, that pair counts as the third pair of congruent sides.

SSS

Answer 2

Question?

Answer 3

So, if two triangles are side by side its always SSS?

Answer 4

No.

Answer 5

Look at this chart. Look at the SSS line of it.

Answer 6

so thats asa?

Answer 7

It is not the side by side.

It is 3 sides of one triangle congruent to 3 sides of the of the other.

In the problem you posted, the pair of sides that counted as the third pair just happened to lie atop each other.

Answer 8

Yes. I always mark the side the two triangles share to be sure it is ASA. But, that is just how I do it.