Mark used a number line to modle dividing 2/3 by 3 he divided the number line frkn 0 to 1 in 3 equal sections and then divided each of those sections into 2 equal parts marks says 2/3 ÷3 is 1/3 is he correct

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