\documentclass[12pt, a4paper]{article}
\usepackage[utf8]{inputenc}
% \usepackage{amsmath}
% \usepackage{amssymb}
% \usepackage{polski}
% \usepackage{fancyhdr}
% \pagestyle{fancy}
% %\pagenumbering{gobble}
% \headheight=15pt


\usepackage{graphicx}
\def\pic#1#2{\DeclareGraphicsRule{.#2}{mps}{*}{}\includegraphics{#1.#2}}

\begin{document}
    \includegraphics[scale=1.3]{preview.mps}
\end{document}
% pair a,b,c,s;
% numeric u;
% path P;

% color pink;
% pink:=blue+red;

% u:=1cm;
% a:=(0,0);
% b:=(0,u);
% c:=(u,0);

% s:=(a+b+c)/3;

% P:=a--b--c--cycle;


% fill P withcolor red;
% draw P;

% draw s withpen pencircle scaled 1bp withcolor green+red;

% label.llft(btex $A$ etex,a) withcolor red;
% label.top(btex $B$ etex,b) withcolor red;
% label.lrt(btex $C$ etex,c) withcolor red;

% label.llft(btex $S$ etex,s) withcolor green;








% %-----------------------------------------------------------------
% numeric u;
% pair o,a[];

% u:=2cm;

% o:=(0,0);

% a[1]:=(0,u);

% numeric n;
% n:=9;

% for i:=2 upto n: a[i]=a[i-1] rotatedaround(o,360/n); endfor

% %-----------------------------------------------------------------

% draw for i:=1 upto 9: a[i]-- endfor cycle withcolor red;

% draw a[1]--a[4]--a[7]--cycle withcolor red;
% draw a[1]--a[3] withcolor red;
% draw a[4]--a[6] withcolor red;
% draw a[7]--a[9] withcolor red;

% fill Okragwpisany(a[1],a[2],a[3]) withcolor blue;
% fill Okragwpisany(a[1],a[3],a[4]) withcolor blue;
% fill Okragwpisany(a[4],a[5],a[6]) withcolor blue;
% fill Okragwpisany(a[4],a[6],a[7]) withcolor blue;
% fill Okragwpisany(a[7],a[8],a[9]) withcolor blue;
% fill Okragwpisany(a[7],a[9],a[1]) withcolor blue;
% fill Okragwpisany(a[1],a[4],a[7]) withcolor blue;




% %-----------------------------------------------------------------
% numeric u;
% pair a,b,c,cc,d;

% u:=2cm;

% %-----------------------------------------------------------------

% a=(0,0);
% b=(4u,0);
% c=(3u,2u);

% draw a--b--c--cycle;
% d:=Rzut(Srodekwpisanego(a,b,c),a,b);
% draw c--d withcolor blue;
% fill Okragwpisany(a,d,c) withcolor red;
% fill Okragwpisany(d,b,c) withcolor green;

% draw Srodekwpisanego(a,d,c)--Srodekwpisanego(d,b,c);




% %-----------------------------------------------------------------
% numeric u;
% pair a,b,c,cc,d,e,f,g,h;

% u:=2cm;

% %-----------------------------------------------------------------

% a=(0,0);
% b=(4u,0);
% c=(3u,2u);

% draw a--b--c--cycle;
% d:=(u,0);
% draw c--d withcolor blue;
% draw Okragwpisany(a,d,c);
% draw Okragwpisany(d,b,c);
% e=Srodekwpisanego(a,d,c);
% f=Srodekwpisanego(d,b,c);
% %draw e--f;

% g:=Rzut(e,d,c);
% h:=Rzut(f,d,c);


% draw (g reflectedabout(e,f))--(h reflectedabout(e,f)) dashed evenly withcolor red;

% label.llft(btex $A$ etex,a);
% label.lrt(btex $B$ etex,b);
% label.top(btex $C$ etex,c);\


% %-----------------------------------------------------------------
% numeric u;
% pair a,b,c,cc,d,e,f,g,h,i,j;

% u:=2cm;

% %-----------------------------------------------------------------

% a=(0,0);
% b=(5u,0);
% c=(4u,3u);

% draw a--b--c--cycle;
% d:=(2*u,0);
% draw c--d withcolor blue;
% draw Okragwpisany(a,d,c);
% draw Okragwpisany(d,b,c);
% e=Srodekwpisanego(a,d,c);
% f=Srodekwpisanego(d,b,c);
% %draw e--f;

% g:=Rzut(e,d,c);
% h:=Rzut(f,d,c);

% i:=g reflectedabout(e,f);
% j:=h reflectedabout(e,f);

% draw i--j dashed evenly withcolor red;

% Punkt(a);
% Punkt(b);
% Punkt(c);
% Ppunkt(e);
% Ppunkt(f);
% Punkt(g);
% Punkt(h);
% Punkt(i);
% Punkt(j);

% label.llft(btex $A$ etex,a);
% label.lrt(btex $B$ etex,b);
% label.top(btex $C$ etex,c);

% label.lrt(btex $O_1$ etex,e);
% label.lrt(btex $O_2$ etex,f);

% label.rt(btex $K$ etex,g);
% label.lrt(btex $L$ etex,h);
% label.urt(btex $M$ etex,i);
% label.urt(btex $N$ etex,j);







% def Okrag(expr o, r) =
%     (o+(0,r))..(o+(r,0)).. (o+(0,-r))..(o+(-r,0))..cycle
% enddef;

% def Dlugosc(expr a,b) =
%     sqrt(xpart(a-b)*xpart(a-b)+ypart(a-b)*ypart(a-b))
% enddef;

% def Obwod(expr a,b,c) =
%     (Dlugosc(a,b)+Dlugosc(b,c)+Dlugosc(c,a))
% enddef;

% def Pole(expr a,b,c) =
%     begingroup
%         save p; numeric p;
%         p:=Obwod(a,b,c)/2;
%         sqrt(p*(p-Dlugosc(a,b))*(p-Dlugosc(b,c))*(p-Dlugosc(c,a)))
%     endgroup
% enddef;

% def Promienwpisanego(expr a,b,c) =
%     2*Pole(a,b,c)/Obwod(a,b,c)
% enddef;

% def Punktnadwusiecznej(expr b,a,c) =
%     b rotatedaround(a,(angle(c-a)-angle(b-a))/2)
% enddef;

% def Srodekwpisanego(expr a,b,c) =
% begingroup
%     save aa, bb, i; pair aa, bb, i;
%     aa:=Punktnadwusiecznej(b,a,c);
%     bb:=Punktnadwusiecznej(c,b,a);
%     i:=whatever[a,aa]=whatever[b,bb];
%     i
% endgroup
% enddef;

% def Okragwpisany(expr a,b,c) =
%     Okrag(Srodekwpisanego(a,b,c),Promienwpisanego(a,b,c))
% enddef;

% def Rzut(expr a,b,c) =
% begingroup
%     save aa,r; pair aa,r;
%     aa:=a reflectedabout(b,c);
%     r:=(a+aa)/2;
%     r
% endgroup
% enddef;

% def Punkt(expr p) =
%     fill Okrag(p,1bp) withcolor white;
%     draw Okrag(p,1bp) withpen pencircle scaled .6pt;
% enddef;

% def Ppunkt(expr p) =
%     fill Okrag(p,1bp);
% enddef;

% def Kratka(expr m,n,kolor)=
%     begingroup
%     save p; path p;
%     p:=(m,n)*u--(m,n+1)*u--(m+1,n+1)*u--(m+1,n)*u--cycle;
%     fill p withcolor kolor;
%     draw p;
%     endgroup
% enddef;

% def Szachownica(expr m,n) =
%     for i:=0 upto m-1:
%     for j:=0 upto n-1:
%         if((2j-i) mod 5=0):
%         Kratka(i,j,c[3]);
%         label(decimal(i+j),(i+.5,j+.5)*u)
%         else: Kratka(i,j,c[0]); fi;
%     endfor
%     endfor
% enddef;

% %-----------------------------------------------------------------
% numeric u;

% u:=0.5cm;

% color c[];
% c[0]:=white;
% c[1]:=black;
% c[2]:=red;
% c[3]:=blue;
% c[4]:=green;
% c[5]:=blue+red;


% %-----------------------------------------------------------------

% Szachownica(8,8);