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Originally Posted by 4691mls
I have a pretty good idea of how a pound relates to a kilogram or an inch relates to a centimeter, but for some reason I can never keep the Fahrenheit/Celsius comparison in my head.
One thing I've always wondered is why don't countries that use the metric system use the decimeter to avoid using large numbers of centimeters? When I studied the metric system in elementary school a decimeter was one of the size units we learned, but I never see it used.
For example, in the US a person usually gives their height in terms of feet + inches - i.e. "five foot four" or "six feet tall" but from what I've seen in online discussions, in a country that uses the metric system that six-foot person would describe themselves as "182 cm". Why don't they say "18.2 decimeters"?
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Why would anyone use 'decimetre' it to describe their own height when it is not used to refer to the length of anything else.