Another way to say it is that 2cm * 3cm is shorthand for (2)(1cm)(i) * (3)(1cm)(j). We are complecting 3 semantics: measure and unit (which compose a module, in vector terms) and “meaning” (dimension, in vector terms).
This is why in high school physics you are taught to always write down the units of each number: typing them helps avoid a big amount of errors.
Note that “typing” and “vector terms” are not essential, just helps me express it with the HN crowd easily.
This is why in high school physics you are taught to always write down the units of each number: typing them helps avoid a big amount of errors.
Note that “typing” and “vector terms” are not essential, just helps me express it with the HN crowd easily.