I’ve learned about them in school, but I’ve never heard anyone say something is 8 decameters long or anything like that. I’m an American.

  • vettnerk@lemmy.ml
    0·
    1 year ago

    Valid, but rarely used, as it’s usually just as fast to say “two hundred meters” instead of “two hecto meters”.

    However, those prefixes have other (non-SI) uses. A hectare is common way of referring to a 100x100 meter area. And a decare is 10 ares, i.e. 0.1 hectare.