viết CT nhập vào 3 cạnh a,b,c kiểm tra xem nó là tam giác gì(tam giác thường,cân,đều,vuông cân, vuông)

uses crt;
var a, b, c:integer;
begin
clrscr;
textcolor (white);
write (‘nhap canh thu nhat: ‘);
readln (a);
write (‘nhap canh thu hai: ‘);
readln (b);
write (‘nhap canh thu ba: ‘);
readln (c);
if (a+b>c) and (b+c>a) and (a+c>b) then
 begin
  textcolor (green);
  if (a*a=b*b+c*c) or (b*b=a*a+c*c) or (c*c=a*a+b*b) then
   begin
    writeln (‘DAY LA TAM GIAC VUONG’);
    readln;
   end
  else
   if (a=b) or (b=c) or (c=a) then
   begin
    writeln (‘DAY LA TAM GIAC CAN’);
    readln;
   end
   else
    if (a=b) and (b=c) then
    begin
     writeln (‘DAY LA TAM GIAC DEU’);
     readln;
     end
    else
     begin
     if (a*a=b*b+c*c) and (b=c) or (b*b=a*a+c*c) and (c=a) or (c*c=a*a+b*b) and (a=b) then
     textcolor (green);
     writeln (‘DAY LA TAM GIAC VUONG CAN’);
   readln;
   readln;
  end;
  end
else
 begin
  if (a+b>c) and (b+c>a) and (a+c>b) then
  writeln (‘DAY LA TAM GIAC THUONG’);
  begin
   textcolor (lightred);
   writeln (‘BA CANH NAY KHONG THE TAO THANH MOT TAM GIAC !!! VUI LONG NHAP LAI !!!’);
   readln;
  end;
  end;
end.