Charlie Pridham writes
In article ,
says...

Thank Gawd for the metric system.

Metric has the brilliant property that lengths and volume measures 'fit'
with each other - eg 1ml of water is 1cc so 1 litre is 10cm x 10x m
x10cm, which is also 1kg, so 1 tonne = 1m cubed.

But it doesn't have useful sized measures - the inch is still good for
smallish things, and the foot is ideal for all sorts of things - much
easier to understand the difference between a 10ft square room and a
12ft square room than a 3.something m square room and a 3.something else
m square room.

Doesn't work at sea though! chains, cables, fathams and nautical miles
all work exactly with the size of the earth, meters don't work at all and
french ships have a much harder job of trying to navigate in metres which
all has to be corrected and adjusted to fit :~)

We tend to measure angles in degrees, but mathematicians measure in
radians (a one radian slice of cake has the property that the curved
edge is the same length as the two straight edges) and some scientists
do it in grads (100 grads to the right angle)
--
Kay