It is impossible to give sensible answer to the question because:a polyhedron is a 3-dimensional figure and, the area inside and outside is the same. The fact that the question specifies insidesuggests that it may be the volume of the figure that you are after.however, there is no such shape as a penturdodecahidron.
There kind of solid object will determine the formula that will be used to find its volume.
The formula used to calculate the volume of a recrangular solid is:L*W*H=V
The formula used to calculate the volume of a rectangular solid is: L*W*H=V
V = Bh
length by width by height
Volume= length times width times height
The formula is Volume = (1/3)a2h where:a = side lengthh= height
To determine the density of a substance, you would divide the mass of the substance by its volume. The formula for density is density = mass/volume. Measurements should be taken in units such as grams for mass and cubic centimeters for volume.
The above formula x pi is used to determine the volume of a CYLINDER. If you are looking for the formula to determine the volume of a CONE, then take the answer from the above formula, multiply times pi and divide by 3. IOW, the formula to determine the volume of a cone is (pi x radius squared (of the base) multiplied by height) divided by 3. Volume of a CYLINDER = (pi x r2 x h) Volume of a CONE = 1/3(pi x r2 x h)
depth*area=volume volume/specific gravity=total tonnage
the volume of a regular solid is the area of it's base multiplied by it's height.