Uploaded July 2017 | Updated September 2026, 1 week ago
demonstrations.wolfram.com/IllustratingArithmeticWithGraphicArrays
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration illustrates simple arithmetic expressions of the type axb+c, represented graphically as arrays of dots or playing-card pips.
Contributed by: Izidor Hafner
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/IllustratingArithmeticWithGraphicArrays
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration illustrates simple arithmetic expressions of the type axb+c, represented graphically as arrays of dots or playing-card pips.
Contributed by: Izidor Hafner
Audio created with WolframTones:
tones.wolfram.com







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http://demonstrations.wolfram.com/DissectionOfASquareToAParallelogramWithTheSameBase
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
Two polygons of the same area are said to be equivalent. In [1], Tarski defines the degree of equivalence of two equivalent polygons V and W as the smallest natural number n for which there exists a dissection of V to W using n pieces. The function is d...
Contributed by: Izidor Hafner
Audio created with WolframTones:
http://tones.wolfram.com Dissection of a Square to a Parallelogram with the Same Base](https://i.ytimg.com/vi/OoM3PXXrcJM/mqdefault.jpg)


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http://demonstrations.wolfram.com/RouletteEpitrochogonOfARegularPolygonRollingAroundAnotherReg
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
An epitrochogon is the trace (roulette) of a point attached to a polygon rolling without slipping around the outside of another polygon [1]. The epitrochogon can be curtate if the tracing point is inside the rolling polygon, or prolate if it is outside....
Contributed by: Erik Mahieu
Audio created with WolframTones:
http://tones.wolfram.com Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon](https://i.ytimg.com/vi/PRnFjPaAGYI/mqdefault.jpg)