The sphere has visited the square intent on making the square understand the three-dimensional world that he, the sphere, belongs to. He explains the notions of "above" and "below," which the ...

is the 𝑓-vector of any convex 4-dimensional polytope, or more generally of a strongly regular cellular 3-sphere, that is, a regular cell complex homeomorphic to the 3-dimensional sphere such that any ...

Calculate the volume and surface area of a football with a radius of 12 cm to 1 decimal place. \(\begin{array}{rcl} \text{Volume} & = & \frac{4}{3} \pi r^3 ...