Uploaded January 2018 | Updated September 2026, 1 week ago
demonstrations.wolfram.com/SumOfNumbersOnInvisibleFaces
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
The faces of a polyhedron are labeled 1, 2, 3, .... Find the sum of the numbers on the invisible faces.
Contributed by: Izidor Hafner
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/SumOfNumbersOnInvisibleFaces
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
The faces of a polyhedron are labeled 1, 2, 3, .... Find the sum of the numbers on the invisible faces.
Contributed by: Izidor Hafner
Audio created with WolframTones:
tones.wolfram.com
![First[{}]](https://i.ytimg.com/vi/KEOye_F3GEI/mqdefault.jpg "First[{}]
http://demonstrations.wolfram.com/ThePlemeljConstructionOfATriangle12
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
First[{}]
First[{}]
Audio created with WolframTones:
http://tones.wolfram.com")
