Question 1023779
{{{A+B+C=180}}}
{{{C=180-30-45}}}
{{{C=105}}}
So then use the law of sines,
{{{sin(A)/a=sin(B)/b}}}
{{{sin(30)/20=sin(45)/b}}}
{{{b=20*(sin(45)/sin(30))}}}
{{{b=20sqrt(2)}}}
{{{b=28.284}}}
and,
{{{sin(A)/a=sin(C)/c}}}
{{{c=20*(sin(105)/sin(30))}}}
{{{c=20*1.93185}}}
{{{c=38.637}}}