Suppose you know that $ΔTAP≅ΔDOG$ and that $TA=14$, $AP=18$, $TP=21$, and $DG=2y+7$.  

1. On your paper, draw a reasonable sketch of $ΔTAP$ and $ΔDOG$.

   Answer:

             

2. Find $y$. Show all work.

   Hint (b):

   How are these triangles related? How can that relationship help you find $y$?

   Step (b)

   $2y+7=21$, because corresponding sides are congruent (equal).