**In class**: we worked on constructions and identifying the conditions for triangle congruence. For example, Can you tell why either 0 or 1 triangles are possible given any set of three side lengths?

The side lengths from point A and B must meet at a point but if we let them swing, we will notice that the arc traced out by their endpoints only meet at one place (2 if we allow the reflection of this situation on the *other side* of segment AB)

And so all triangles constructed from those three lengths will be congruent to the triangle below.

**Assignment:**In class we started a packet "How many ways can you identify a unique triangle?" this is

*not homework*. Students will have time to complete this in class tomorrow.