Solid can be regularly shape (cylindrical, cubical, spherical, etc. )or irregularly shaped (metal turning or shot ).an object's shape determine which of the following two method is used to determine its volume. The dimension of regularly shaped object can be measured with a ruler and the volume calculated using the appropriate geometric equation. Irregularly shaped solid cannot easily be measured with a ruler. Instead, their volume is most easily determined by the displacement of water or some other liquid.