Find the volume of the composite figure.​

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 as a product: ac^2–ad+c^3–cd–bc^2+bd

The complement of an angle is one-sixth the measure of the supplement of the angle. what is the measure of the complement angle?