Geometryyyyyyyyyyyy help plzzzz
The diagram below models the layout at a carnival where G, R, P, C, B, and E are various locations on the grounds. GRPC is a parallelogram.
Part A: Identify a pair of similar triangles.
Part B: Explain how you know the triangles from Part A are similar.
Part C: Find the distance from B to E and from P to E. Show your work.
Will you please help me?!? I don't get how to do it. I know Part A and B, but not C. I just don't get what to do because only one side is given for that triangle. If you would help that would mean a lot because I really wanna understand this in some way. Thank you so much in advance.