Program HINHTRON;

Uses Crt;

Var r,dt,cv:real;

Begin

Clrscr;

Writeln('TINH DIEN TICH & CHU VI HINH TRON:');

Writeln('------------------------------------------------------');

Write ('Nhap ban kinh R=');

readln(r);

dt:=pi*r*r;

cv:=2*pi*r;

Writeln('Dien tich hinh tron la:',dt:6:2);

Writeln('Chu vi hinh tron la:',cv:6:2);

Readln;

End.