 We can now take a look at the measurement we started with. If we mark the equal segments on the measuring tape to be meters, we get two meters. If we mark the equal segments to be feet, we get six and fifty-six one-hundredths feet. Here we need to highlight a key difference between the pure mathematics and the physics of measuring distances. Math uses exact coordinates to give us the exact distances, but physical measurements always involve a level of inaccuracy. For completeness purposes, you will often see a distance accompanied by an estimated error magnitude. In this case we would say that the distance to the pillar is two meters, plus or minus one millimeter, or two point one nine yards, plus or minus some fraction of an inch. Depending on the accuracy of the tape measure.