Question 810817
The question says: 
Find the length of DB given DB is an altitude of angle ADC, the area of Angle ADC is 14 square units, and AC is 7.  How do I go about solving it?

Draw the Triangle ABC where AC is the base. Show an altitude (BD) from B to side AC.
                                                       
                              B    



            A                 D            C
  
The equation for the area of a triangle is:

 Area=  1/2 (measure of base)(measure of altitude)

You have been given the area (Area = 14 square units) and the measure of a base (AC = 7 units).

Therefore 14=1/2(7)(measure of altitude)

Solving, the measure of the altitude is 4 units