1

#input

x=cellfun("str2double",strsplit(input('' ,'s')));
y=cellfun("str2double",strsplit(input('' ,'s')));
z=cellfun("str2double",strsplit(input('' ,'s')));

#vec
v1=y .- x;
v2=z .- x;
#print("%f %f",v1,v2);
#a.b=|a|.|b|cos(temp)
temp=abs(acos((dot(v1,v2)/(norm(v1)*norm(v2)))*180/pi)); #rad deg
printf("%f\n",temp);
temp2=cross(v1,v2); #cross
temp3=0.5*norm(temp2);
print("%f\n",temp3);
temp2=temp2 ./ temp2(1);
printf("%f %f %f",temp2(1),temp2(2),temp2(3));