program Project165;

{$APPTYPE CONSOLE}

uses
  SysUtils;

var x1,y1,x2,y2,x3,y3:integer;
var a,b,c,s,p,hc,ha,hb:real;
begin
writeln('vvedit');
readln(x1,y1,x2,y2,x3,y3);
a:=SQRT(SQR(x1-x2)+SQR(y1-y2));
b:=SQRT(SQR(x1-x3)+SQR(y1-y3));
c:=SQRT(SQR(x2-x3)+SQR(y2-y3));
if ((a+b)>c) and ((a+c)>b) and ((b+c)>a) then writeln('trykutnyk isnyje')
else  writeln('trykutnyk ne isnyje');
p:=(a+b+c)/2;
S:=sqrt(p*(p-a)*(p-b)*(p-c));
ha:=(2*s)/a;
hb:=(2*s)/b;
hc:=(2*s)/c;
writeln('ha=',ha:5:2, 'hb=',hb:5:2, 'hc=',hc:5:2);
readln;
  { TODO -oUser -cConsole Main : Insert code here }
end.