



 
Hi Troy, The area of a triangle is given by \[\mbox{ area } = \frac12 \mbox{ base } \times \mbox{ height.}\] You know that the area i 28 square units so this gives you an equation in $x.$ expand, simplify, and then solve for $x.$ Penny 



Math Central is supported by the University of Regina and The Pacific Institute for the Mathematical Sciences. 