Question 1078215
Use the law of sines,
{{{sin(R)/r=sin(T)/t}}}
{{{sin(T)=sin(104)(10/20)}}}
{{{sin(T)=0.4851}}}
{{{T=29.02}}}
So then,
{{{104+S+29.02=180}}}
{{{S=46.98}}} or {{{S=47}}}