Program Chu_Nhat_Program;
Uses Crt;
Var a,b,s,: real;
Begin
Clrscr;
Writeln(‘ TINH DIEN TICH :’);
Write(‘Nhap chieu dai=’); readln(a);
Write(‘Nhap chieu r />s:=a*b;
c:=(a+b)*2;
Writeln(‘Dien tich hinh chu nhat la:’,s:6:2); Readln;

End.