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GeoGebra Topic Problem German

Category German

AreCongruent() not alway correct

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AreCongruent() sometime wrong

rami shared this problem 2 years ago

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AreCongruent()

for isosceles triangles sometime correct and sometime wrong

Note: sometime need a lot time until you can receive a error.

But see the snapshot: the error exists.

9f622c24a5b85a57aa14cd05b4a86bf2

GGB 5.0.524 WIN10

Files: congruentBug.ggb

The same problem

Comments (6)

Michael Borcherds ● 2 years ago

Please can you save the .ggb file showing the problem?

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Noel Lambert ● 2 years ago

lol

je crois que Mike voudrait le fichier ggb avec "wrong" affiché

malheureusement (2 échecs) lorsqu'on sauve puis ouvre à nouveau, le fichier affiche de nouveau correctement la congruence

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rami ● 2 years ago

Is the same as in my first post in this thread.

The comment "wong !" is dynamically and after initial the state is not wrong.

See properties/advanced/condition of text2

Attached the ggb-file again with save as... in the the state wrong.

==================================================

I reproduce the error as follows:

Open with ggb 5

Hold point F with the mouse and move it approx. 5 times horizontally all the way to the left and all the way to the right (or until "wrong !" flashes briefly).

Files: congruentBug02....

URL

rami ● 2 years ago

maybe this version with the button "Auto test" can help

Files: congruentBug03....

URL

lewws ● 2 years ago

Hi Raymond,

Just tested your latest file. Yes. Unusual to be giving sometimes true, sometimes false.

But strange is after some effort play different layout, then all become congruent answers only.

After saving file (see attached 03-a)

on reopening file, again, when triangles are geometrically congruent, the boolean is again sometimes true sometimes false or

always congruent.

Unable to detect why.

Files: congruentBug03-...

URL

rami ● 2 years ago

Hi lewws

My file congruentBug03 is very specific only to demonstrate the the bug.

When you shift some points or change l1 nothing works anymore.

In the attachment a version without bug and more robust for changes.

check it's (realy) congruent (3 sides are same)
set the decorations
check the command "AreCongruent()" is correct
Auto-modify F with a slider and a button (depending actual position of F)

Now it's more easy to explore the application, to hide some objects or change some things.

Files: congruent04.ggb

URL