figure
line([10;0],[0;10])
disp('enter the value of triangle');
x1=input('x1=');
y1=input('y1=');
x2=input('x2=');
y2=input('y2=');
x3=input('x3=');
y3=input('y3=');
hold on
line([x1;x2],[y1;y2]);
line([x1;x3],[y1;y3]);
line([x3;x2],[y3;y2]);
hold off
disp('enter the value of theta');
th=input('theta is=');
T=[1 0 0 ;0 1 0;0 -10 1];
R=[cosd(th) sind(th) 0; -sind(th) cosd(th) 0; 0 0 1];
RF=[1 0 0; 0 -1 0; 0 0 1];
Rin=[cosd(-th) sind(-th) 0; -sind(-th) cosd(-th) 0; 0 0 1];
Tin=[1 0 0;0 1 0;0 10 1 ];
CT=T*R*RF*Rin*Tin;
Tri=[x1 y1 1; x2 y2 1; x3 y3 1];
Tri=Tri*CT;
disp(Tri);
p=Tri(1,1);
q=Tri(1,2);
s=Tri(2,1);
t=Tri(2,2);
u=Tri(3,1);
v=Tri(3,2);
%figure
hold on
axis([-80,25,-20,80]);

line([10,-80],[-20,10]);
line([p;s],[q;t]);
line([p;u],[q;v]);
line([u;s],[v;t]);
hold off