Quote:
Originally Posted by nZtiZia
for the sake of accuracy, proportional doesn’t mean the same as equal, though, so one shouldn’t use the value of one measurement in lieu of the other measurement. in this situation, circumference is the correct value to use. 
“proportional is at a constant ratio (to) two magnitudes (numbers) are said to be proportional if the second varies in a direct relation arithmetically to the first while equal is (label) the same in all respects….”
https://youtu.be/JSLsfxm4ntE |
to clarify what i meant was that for the circumference to change diameter has to change as well whether up/down