Refer to $∆ABC$ at right. Determine if each triangle below is congruent to $∆ABC$, similar but not congruent to $∆ABC$, or neither. Justify each answer. If you decide that they are congruent, organize your reasoning into a flowchart.

1. 

   Hint (a):

   Find the missing angles using the Triangle Angle Sum Theorem.

   Answer (a):

   Similar because of $AA\sim$, but not congruent. Why?

2. 

   Answer (b):

   Not similar and not congruent because there are no corresponding congruent angles between the triangles.