If it distorts a finite amount for a small shear force, it is a solid.
There is no general rule. There are different formulae for simple figures like a sphere, a cone and a cylinder. Other figures have yet other and more complex formulae.
The most simple example is water: gas, liquid or solid.
with a scale
radar
Length times width.
The judge's finding that a rule of the court was broken
The 3 times circle rule is a rule for finding the circumfrence of a circle. Basiclly, you multiply the diameter by 3.
The answer depends very much on the shape of the solid figure.
The rule is: 0.5*(N2-3N) = number of diagonals
length times width
Finding the nearest decimal
it will kill ther parents and they will rule.