There is a triangle with the height of 2 and a base of (x 1) what is the area

Through non-collinear points there is exactly one plane.

How do the number line graphs of the solutions sets of -23 > x and x-23 differ?

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