A quantity formed from the combination of other measurements is called a derived quantity.

Here's why:

* Derived quantities are quantities that are calculated from other quantities, typically using a formula.

* Base quantities are fundamental, independent measurements. Examples include:

* Length (meter)

* Mass (kilogram)

* Time (second)

* Temperature (Kelvin)

* Electric current (Ampere)

* Amount of substance (mole)

* Luminous intensity (candela)

Examples of derived quantities:

* Speed is derived from distance and time (speed = distance/time)

* Area is derived from length (area = length x width)

* Volume is derived from length (volume = length x width x height)

* Density is derived from mass and volume (density = mass/volume)

* Force is derived from mass and acceleration (force = mass x acceleration)

Let me know if you'd like more examples!