Well to find the volume it is the shape's length x height x width. If that is what you are looking for.
The same units are used for regular or irregular objects - for example, kilogram per cubic meter.
convex shaped lenses are used to magnify objects
A rectangle and two circles.
Ruler
A telescope
graduated cylinder
Yes
to find the volume of regular shaped objects is by getting the product of its length,width,and height.the formula is LxWxH
For lifting heavy objects that would be awkward or hard for a regular crane to do.
A vice grip is used to hold small objects tighter than regular pliers will.
A finger joint is joint where a piece of wood which has rectangular shaped tails and another piece of wood which have rectangular shaped pins fit and slot in together.
The unit for volume is the same, whether the shape is regular or irregular.