The shaded figure below is a diagram of a triangular tabletop.

A triangle has a base of 192 centimeters and a height of 113 centimeters.

Which two measures can be used as the base and height when finding the area of the tabletop?
113 cm and 140 cm
113 cm and 192 cm
159 cm and 140 cm
159 cm and 192 cm

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