Examples of irregular solids include rocks, prisms, beans and screws. Each of these objects feature an irregular shape that is not composed of other recognized shapes.
An irregular solid is distinguished by the inability to determine its area, volume or mass by measuring its length, width and height. A screw, for example, features tiny threads that add area to its overall shape. Rocks, prisms, beans, grains of rice and other irregular solids have ridges, bumps and other shapes that cannot be accurately measured.
Users often employ the liquid displacement method to determine an irregular solid's mass, which involves calculating the volume of a container of water, then submerging the solid in the water, calculating the volume and subtracting the original volume from the volume with the solid submerged.