Question 314139
{{{drawing(300,300,-10,10,-10,10,circle(0,0,6),locate(0.25,3,h),locate(-3,-0.25,R),locate(3,-0.25,R),line(-6,0,6,0),line(0,0,0,6),line(-6,0,0,6),line(0,6,6,0))}}}
{{{h=R=12}}}
{{{b=2R=24}}}
{{{A=(1/2)bh=(1/2)(24)(12)=144}}}