Program Hotboy ;
Uses crt;
Var a,b,c,p,S: real;
Begin
clrscr;
Write('Nhap canh a:');readln(a);
Write('Nhap canh b:');readln(b);
Write('Nhap canh c:');readln(c);
p:=(a+b+c)/2;
S:= sqrt(p*(p-a)*(p-b)*(p-c));
Write('Dien tich hinh tam giac la',s:3:6);
Write('chu vi cua hinh tam giac la',a+b+c);
Readln
End.