program kkk;
uses crt;
var a,b,c,q,s,p:real;
BEGIN
clrscr;
writeln('Ââåäèòå a b q');
readln(a,b,q);
q:=q/180*pi;
c:=sqrt(sqr(a)+sqr(b)-2*a*b*cos(q));
writeln('c=',c);
p:=(a+b+c)/2;
S:=sqrt(p*(p-a)*(p-b)*(p-c));
writeln('S=',S:7:2);
readln;
END.