A cross-section is the intersection of a solid object with a plane, resulting in a two-dimensional shape. It is used to determine volumes by slicing the object into thin slices.
Volume: The amount of space occupied by a three-dimensional object, often calculated using integrals in calculus.
Integral: A mathematical concept that represents the accumulation of quantities, such as areas under curves or volumes.
Slicing: A method for determining volume by dividing a solid into thin slices and summing their volumes.