Unexpected behaviour using perpendicular and parallel lines

kathrynp shared this question 6 years ago
Answered

Hi,


Have I missed something? (I've not been using GeoGebra much for geometry recently.) Going back to basics!!!


In the two attached constructions of rectangles, I expected BC and AD to remain a fixed length as I varied the length of AB, but instead the rectangle stays similar to the original one.


    GeoGebra 4.4.7.0 (10 January 2014)

    Java: 1.7.0_40

    Codebase: file:/C:/Users/Kathryn/AppData/Roaming/GeoGebra%204.4/jars/current/geogebra.jar

    OS: Windows 8

    Architecture: x86 / x86

    Heap: 247MB

    CAS: Giac/JNI


    Kathryn

    https://ggbm.at/565179

    https://ggbm.at/565181

Comments (3)

photo
1

Hi kathrynp


Circles have fixed radius...


https://ggbm.at/565183

photo
1

Hi,


Yes, I had worked out I can do it that way, but wanted to be able to drag the vertices.

It must be something to do with dependencies. I would still like to know why!


K.

photo
1

My guess is that C = Point[e] positions the point according to some internal path parameter, and that this parameter somehow depends on other stuff...?


I Normally use two points on the axes + the origin but I guess you want to be able to drag both A and B.

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