Iwaited to long and procrastinated too long so i for got how to solve it. (the boxed one)

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

Which of the following circles have their centers on the x-axis? check all that apply.

How do you write 600 as a product of its prime factors (index! )