Examine the diagram at right. If $\overline{AC}$ passes through point $B$, then answer the questions below.

1. Are the triangles similar? If so, make a flowchart justifying your answer.

   Hint (a):

   What do the tick marks on the angles mean? What is the $m∠B$? How can these help you determine if the triangles are similar?

2. Are the triangles congruent? Explain how you know.

   Hint (b):

   Use the Pythagorean Theorem to calculate the length of $\overline{BD}.$