Six seconds is only one-sixth of 600 degrees, which is insignificant in normal cases, but it can cause miles of misalignment when measuring the circumference of an object as large as Earth. However, even in his day, measurements were accurate to degrees and minutes, and careful measurements of “7 degrees, 12 minutes” (7.2 °) were obtained. If its triangular measurements were misaligned by 6 seconds, it would be about one-half to one-tenth of a degree. Even a two-minute accident can take thousands of miles around the globe. Therefore, except for just six seconds, which is one hundredth of a 600th of a degree measurement, the accuracy of the Earth’s circumference was only 74 kilometers (45 miles), which is unbelievably accurate in his day. It’s so brilliant.