An arch in the shape of a parabola has a height of 50 feet at the center and a span of 120 feet across. Find the height of the arch 25 feet from the center. (Solve the problem. Type only a number for your answer. 80 points!!!

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