Directions are expressed as units of
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The unit will depend on the context of the direction. For distance on land the units should be meters.
Here are some international units of measurement:Mass is expressed in kilograms.Length and distance is expressed in meters.Time is expressed in seconds.Electrical current is expressed in amperes.Speed is expressed in meters/second.
That depends on how directions are given, Usually they are straight on, left or right when reaching a prominent landmark. They could however also be given in terms of road names/numbers, Cartesian map coordinates or compass degrees.
The length of a triangle can't be expressed in square units and only its area is expressed in square units
Because it is the square units around the base.