|Conceptions of unit
||A subdivision of a length is translated to obtain a measure.
||Each subdivision is identical.
||Units fill the space.
||Units can be partitioned.
||Measures are additive, so that a measure of 10 units can be thought of as a composition of 8 and 2, and so on.
|Conceptions of scale
||Any point can serve as the origin or zero-point on the scale.
||The choice of units in relation to the object determines the relative precision of the measure. All measurements are inherently approximate.