You can use any convenient length units for H , V , and L , as long as all three use the same units: feet, meters, centimeters, or so on.
(You; can use; any convenient length units; for H , V , and L; T:as long as all three use the same units: feet, meters, centimeters, or so on) (all three; use; the same units)
You all three
can use use
any convenient length units for H , V , and L T:as long as all three use the same units: feet, meters, centimeters, or so on
the same units