From your question, it is difficult to determine why you can express the volume of a 12-sided object in cubic units. We do not know the measurements or method to which you are referring.
In metrics, the units of measurement used to express the volume of smaller objects would be the liter, deciliter, centiliter and milliliter. The English system of measurement uses gallons, quarts, pints, and cups to express the volume of smaller objects.
You can measure the volume of irregular solids by using water displacment which is meausured in mililiters (mL), and that, in turn, can be converted to cubic centimeters (cm3)
The volumes of all objects are expressed in the third power of whatever units are being used to measure their dimensions. For example, if an object is very small and you measure its dimensions in millimeters, its volume would be expressed in cubic millimeters.
When volume is constant, the masses of two objects are in direct proportion to their densities.
An objects density is determined by its' weight and volume.
An objects density is determined by its' weight and volume.
Expansion means that the volume increases......
The formula of volume
Density equalls mass divided by its volume.
You can express is at a proportion by mass or by volume.
mass divided by volume... mass/volume=density
an everyday object that has the volume of a cubic metre is a sphere