Sure, the definition of a meter may be a little bit arbitrary. But the advantage of metric for measuring distances is that the units are all factors of 10. 10

Sure, the definition of a meter may be a little bit arbitrary. But the advantage of metric for measuring distances is that the units are all factors of 10. 10 mm = 1 cm 10 cm = 1 dm 10 dm = 1 m 1000 m = 1 km Makes math and scaling up and down a lot easier than having to remember that 12 in = 1 ft 3 ft = 1 yd 5280 ft = 1 mi 1760 yd = 1 mi