Vivian starts in the northwest corner of a swimming pool and swims to the southeast corner. then she swims along the width, a distance of 48 yards, and then along the length, a distance of 20 yards. once vivian returns to her starting point, how far has she swum?

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. part b: which line segment on triangle dbc corresponds to line segment ef? explain your answer. part c: which angle on triangle dbc corresponds to angle f? explain your answer. asap