measure length to the nearest centimeter and inch;

http://www.funbrain.com/cgi-bin/meas.cgi?A1=s&A2=0&A3=0

http://www.funbrain.com/cgi-bin/meas.cgi?A1=s&A2=1&A3=0

http://www.funbrain.com/cgi-bin/meas.cgi?A1=s&A2=0&A3=0&INSTRUCTS=1