Aline segment has a midpoint of (6, 4) and an endpoint of (2, 1). what is the other endpoint of the line segment?
a. (10,7)
b. (4,5)
c. (7,10)
d. (-2,-2)

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