👉 The term "circumcone" refers to a cone-shaped object that is formed by joining two concentric circles. The circumference of a circle is given by the formula C = 2πr, where r is the radius of the circle. When we join two concentric circles with diameters d1 and d2, the circumference of the resulting shape will be equal to the sum of the circumferences of these two circles, which can be expressed as C = πd1 + πd
