Question 139810
Well, based on the formula for an area of a triangle:
{{{A= (1/2)(base)(height)}}}
substituting the given, {{{156ft^2=(1/2)(b)(12ft)}}}
                     {{{b=(156ft^2)(2)/12ft}}}
                     <pre><font=4=indigo><b>=26feet</pre>  this should be the length of the base
Thank you,
jojo