[br][table][tr][td]Pyramid[br][/td][td]Cone[br][/td][/tr][tr][td]Pyramid is a solid formed by polygon base and all other triangles faces with a common vertex.[br][/td][td]Cone is a solid formed by circular base and rays emanating from a fixed point (vertex) and passing through the base.[br][/td][/tr][tr][td]In the limit, as the number of faces approaches infinity, the shape is a cone.[br][/td][td]There are four types of cones: circular, elliptical, right, and oblique.[br]In the figure left, keep sliding the number of sides and see that as the number of triangular faces increases, the pyramid begins to look more and more like a cone.[br][br]So, a cone is also a pyramid, and its fifth type is n = ∞.[br][/td][/tr][/table]

In the assumption as explained above, we can understand cone as a pyramid with circular base.[br]In the premises, the volume of cone is[br]              V= 1/3 * B* h[br]However,[br]We can also use cavalieri's principle to find the volume of cone. [br][br]Cavalieri's principle[br]If area of cross sections at parallel heights of two solids and their volume are proportional. [br][br]दुईवटा solids लाई उही उचाईबाट parallel plane ले काट्दा बन्ने cross sections को area र ति दुईवटा solids को volume समानुपातिक हुनेछ। [br][br]वा[br][br]दुईवटा solids लाई उही उचाईबाट parallel plane ले काट्दा बन्ने cross sections को area बराबर भएमा ति दुईवटा solids को volume पनि बराबर हुनेछ।