Carla wants to determine the length of a power line that will be stretched over a lake. She cannot walk through the lake. She was able to take some measurements, hoping to determine the length.
Her measurements are shown below.

Carla believes that the length of the power line is 625 feet, but she's not sure how to explain this to her boss.
Using what you know about triangle congruence, help Carla by writing a brief report as to why the length of the power line is 625 feet.