You can use any you like - it just means there may, or may not, be lots of zeros before, or after, a decimal point.
A sensible unit to use (to avoid lots of zeros and provide a reasonable degree of accuracy) would be millimetres (mm).
You would typically use the metric unit "kilometers" to measure the distance from home to school.
It depends on the distance between the two points. If it is more than a kilometer apart then you would use kilometer. Unless you wanna do it with centimeter. It's just whatever is easier.
You can use a measuring tape or a laser measuring device to measure the distance to the door in metric units, such as meters or centimeters. Simply extend the measuring tool from your starting point to the door to determine the distance.
The distance between towns is commonly measured in miles or kilometers.
the measurer
Meters
distance
A global positioning system (GPS)
I would assume that you would use cm or even mm if you wanted to be more accurate
A metric ruler.
kilometers
Kilometers
meters
You would typically use the metric unit "kilometers" to measure the distance from home to school.
It depends on the distance between the two points. If it is more than a kilometer apart then you would use kilometer. Unless you wanna do it with centimeter. It's just whatever is easier.
Metres (in a built-up area), kilometres if across open spaces.
Miles is best.