#include<cstdio>

 #include<cmath>

 #define PI acos(-1.0)

 using namespace std;

 struct Point

 {

     double x,y;

     Point(double x=,double y=):x(x),y(y){ }

  //   Point read_point() {scanf("%lf%lf",&this.x,&this.y);}

 };

 typedef Point Vector;

 Vector operator + (Vector A,Vector B){return Vector(A.x+B.x,A.y+B.y);}

 Vector operator - (Point A,Point B)  {return Vector(A.x-B.x,A.y-B.y);}

 Vector operator * (Vector A,double p){return Vector(A.x*p,A.y*p);}

 Vector operator / (Vector A,double p){return Vector(A.x/p,A.y/p);}

 double Dot(Vector A,Vector B){return A.x*B.x+A.y*B.y;}

 double length(Vector A){return sqrt(Dot(A,A));}

 double Angle(Vector A,Vector B){return acos(Dot(A,B)/length(A)/length(B));}

 double Cross(Vector A,Vector B){return A.x*B.y-B.x*A.y;}

 Vector Rotate (Vector A,double rad)

 {

     //其中rad为逆时针旋转角

     return Vector(A.x*cos(rad)-A.y*sin(rad),A.x*sin(rad)+A.y*cos(rad));

 }

 Point GetLineIntersection(Point P,Vector v,Point Q,Vector w)

 {

     Vector u=P-Q;

     if(Cross(v,w))

     {

         double t=Cross(w,u)/Cross(v,w);//精度高的时候，考虑自定义分数类

         return P+v*t;

     }

 //    else

  //       return ;

 }

 Point getD(Point A,Point B,Point C)

 {

     Vector v1=C-B;

     double a1=Angle(A-B,v1);

     v1=Rotate(v1,a1/);

     Vector v2=B-C;

     double a2=Angle(A-C,v2);

     v2=Rotate(v2,-a2/);//-表示顺时针旋转;

     return GetLineIntersection(B,v1,C,v2);

 }

 Point read_point(Point &P)

 {

     scanf("%lf%lf",&P.x,&P.y);

     return P;

 }

 int main()

 {

     int T;

     Point A,B,C,D,E,F;

     scanf("%d",&T);

     while(T--)

     {

         A=read_point(A);

         B=read_point(B);

         C=read_point(C);

 //        scanf("%lf%lf%lf%lf%lf%lf",&A.x,&A.y,&B.x,&B.y,&C.x,&C.y);

 //        printf("%.6lf %.6lf %.6lf %.6lf %.6lf %.6lf\n",A.x,A.y,B.x,B.y,C.x,C.y);

         D=getD(A,B,C);

         E=getD(B,C,A);

         F=getD(C,A,B);

         printf("%.6lf %.6lf %.6lf %.6lf %.6lf %.6lf\n",D.x,D.y,E.x,E.y,F.x,F.y);

     }

     return ;

 }