The formula to calculate volume of a cylinder is: V = r2 x Pi x height (r = radius)
Volume = pi*radius2*height
The volume of a triangle can be calculated with the formula: volume=1/2*length*width*height.
density = mass/volume
Use the formula for a cylinder.
A circle is two dimensional, it has area but not volume.
It is a measure of the volume and the formula for the volume of a shape will depend on the shape.
Volume = Length x width x height.
Mass Divided by Volume.