Choose the correct option that explains what steps were followed to obtain the system of equations below

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

Write the equation in general quadratic form: plz !

Find the length of the radius of a circle with the center at -7+2i and a point in the circle at 33+11i