This is a measure of the number of square units needed to cover the outside of a figure or solid, expressed in units squared?

The surface area

Step-by-step explanation:

The surface area of any solid takes the above definition and it can also be defined as the total outer part of the solid shape.

Its unit of measurement is unit².

Take for instance, the sides of the solid is measured in centimetres (cm), the surface area of the solid will be measured in cm².

If the sides is measured in inch (in) or feet (ft), the surface area will be measured in in² or ft² (as the case may be).

Conclusively, the unit of measurement of the surface area takes the square of the unit of measurement of the sides of the shape.