Decide if each triangle below is congruent to $ΔABC$ at right, similar but not congruent to $ΔABC$, or neither. Justify each answer.  

1. 

   Hint (a):

   Find the missing angles using the Triangle Angle Sum Theorem.

   Answer (a):

   Similar because of $\text{AA}\sim$, but not congruent.

2. 

   Answer (b):

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