Program Tam_giac_deu;
uses crt;
var a,b,c: real;
begin
clrscr;
write(‘Nhap a = ‘); readln(a);
write(‘Nhap b = ‘); readln(b);
write(‘Nhap c = ‘); readln(c);
if (a = b) and (b = c) then writeln(‘La tam giac deu’)
else
writeln(‘Khong phai la tam giac deu’);
readln
end.