It's good for pointing at things on a map or high up. My finger is too fat and too short to point at those things.
Chat with our AI personalities
If we were speaking of a stick, if we were going to maintain that stick in the mathematical position of VERTICAL, the stick would be placed and held so that one end of the stick were pointing straight up toward the sky and the distal end of the stick would result in pointing at a 180 degree angle pointing directly at the floor/ground.
you can use a yard stick of a meter stick
when the vectors are not all pointing in the same direction
There's really no difference. If your plans are in meters, it's more convenient to use the meter stick. Likewise, if your plans are in feet, use the yard stick.
Your brain of course! You use a meter stick! A x