A cylinder is a circular prism close circular prism (cylinder)A three-dimensional figure having two parallel bases that are circles equal in terms of radius, diameter, circumference and surface area ...

A cone is a 3D shape with 2 faces and one edge A sphere is a 3D shape. It has one continuous face and no edges A cylinder is a type of prism. It has 3 faces and 2 edges The volume of a cone is linked ...

I always find this Siberian diamond mine to be quite impressive. According to Wikipedia, the Mir mine is 525 meters deep with a radius of 600 meters (at the top). It's not the largest excavated hole ...