👉 Ciselures, also known as "cylindricities", are mathematical expressions used in geometry to describe the ratio of the circumference of a circle to its diameter. They are important in understanding how the volume and surface area of a cylinder can be related to each other. In general, ciselures are defined by a formula that relates the radius \(r\) of a circle, its diameter \(d\), and the ratio of their circumference \(C_c = 2\pi r\)
