Two sides of a triangle measure 3 inches and 9 inches. Which inequality represents all the possible lengths of the third side of the triangle, x?
A x > 6 and x < 12
B. x< 6 and x > 12
C. x > 3 and x < 9
D. x< 3 and x > 9

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