Uploaded November 2017 | Updated September 2026, 1 week ago
demonstrations.wolfram.com/DoublingALineSegmentUsingARightAngle
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows how to double a line segment AB using only a right angle (e.g. a carpenter's square, a try square or an iron square). No compass is needed. Step 1: draw a ray AB Step 2: draw a straight line a through A Step 3: let C be the inte...
Contributed by: Izidor Hafner
Audio created with WolframTones:
tones.wolfram.com
demonstrations.wolfram.com/DoublingALineSegmentUsingARightAngle
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows how to double a line segment AB using only a right angle (e.g. a carpenter's square, a try square or an iron square). No compass is needed. Step 1: draw a ray AB Step 2: draw a straight line a through A Step 3: let C be the inte...
Contributed by: Izidor Hafner
Audio created with WolframTones:
tones.wolfram.com

![Dissection of a Square to a Parallelogram with the Same Base
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)


![Roulette (Epitrochogon) of a Regular Polygon Rolling around Another Regular Polygon
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)

![First[{}]
http://demonstrations.wolfram.com/ThePlemeljConstructionOfATriangle10
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 First[{}]](https://i.ytimg.com/vi/Q92cVJQ5UAc/mqdefault.jpg)


![Linear Regression with Gradient Descent
http://demonstrations.wolfram.com/LinearRegressionWithGradientDescent
The Wolfram Demonstrations Project contains thousands of free interactive visualizations, with new entries added daily.
This Demonstration shows how linear regression can determine the best fit to a collection of points by iteratively applying gradient descent. Linear regression works by minimizing the error function: ( 1 ) / ( n ) UnderoverscriptBox[?, RowBox[{i, =, 1}]...
Contributed by: Jonathan Kogan
Audio created with WolframTones:
http://tones.wolfram.com Linear Regression with Gradient Descent](https://i.ytimg.com/vi/QmlOzt7GleI/mqdefault.jpg)
