The figure shows triangle DEF and line segment BC, which is parallel to EF: Triangle DEF has a point B on side DE and point C on
side DF. The line BC is parallel to the line EF. Part A: Is triangle DEF similar to triangle DBC? Explain using what you know about triangle similarity. (5 points)
Part B: Which line segment on triangle DBC corresponds to line segment EF? Explain your answer. (3 points)
Part C: Which angle on triangle DBC corresponds to angle F? Explain your answer. (2 points)