For each triangle below, decide if it is similar to the triangle at right. If it is similar, justify your conclusion and complete the similarity statement $∆ABC$ ~ $∆$_____. If the triangle is not similar, explain how you know. Assume that the diagrams are not drawn to scale.

1. 

   Hint:

   Solve for the third angle of each triangle. What do you notice?

2. 

   Hint (b):

   Scale factors may not necessarily be whole numbers.

3. 

   Hint (c):

   How is this triangle different from that of part (b)?

   Partial Answer:

   Not similar. Why?