Most wire or string is made with a circular cross section of some particular radius and diameter. The area of that cross section is the well known A = pi*R² which is colloquially pronounced as “pie ...

A second experiment can be carried out to investigate experimentally how the resistance of a metallic conductor at constant temperature depends on the area of cross section. The above experiment is ...

The volume of a cylinder is the area of the cross-section multiplied by the height. D button is used to convert a value in terms of π to a decimal value. To calculate the surface area of a cylinder: ...