Question 1068422
Choose b=12 as the base.  


Find the height using a=8 as a hypotenuse of a right triangle and the given angle.

If y is the height ,  then {{{y/8=sin(78)}}}
{{{y=8*sin(78)}}}.



You want area according to the question.
{{{(1/2)yb}}}
{{{highlight_green((1/2)(8*sin(78))*12)}}}--------simplify and compute this.