@neauoire hello! I'd like to migrate the town of merveilles, is it possible to have an invite?
I already have the black&white avatar :D

Ok, I bought the book.

It will look great on my shelves with my other math books I never open 🙃

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Geogebra has a tool to create tools!
Usually such a feature is implemented as macros that record your actions but here it is different:
The tool uses an example construction as a model, the user simply indicates the input and result objects, the tool extracts the intermediate steps from the example.
I think it's less powerful but more useful than traditional macros in this context.

That's a feature I'd like to implement, just to understand better how it works with the construction graph.

Another great source of puzzles is Catriona Shearer's twitter feed: twitter.com/cshearer41

The hand drawn figures often seem to lack key informations to solve the problem but actually everything is carefully calculated to give just the essential

I especially like the variety of solutions in the replies

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According to the stats, I spent more than 150 hours playing euclidea.xyz over the last four years.

It's a very well designed game and the difficulty is perfectly managed.
On mobile I even find it more pleasant to use than geogebra for quick constructions.

The bonus puzzle for me is to figure out how the validation algorithm works

grgrdvrt boosted


Hey I'm Vladimir, a software engineer and visual artist from Belgrade, Serbia.

All of my algorithmic visuals / data art projects have a home at brutalism.rs/ so take a peek there if you're interested.

I've started Oseka to help artists/engineers steer away from mainstream social media sites and try to form a tighter-knit community. Let's go!

Recently I used geogebra for a work thing and a co-worker told me he loves it but his kid doesn't so much.
I saw the same reaction with young students who had to use it at school and were not as enthusiastic as I was.

I suspect teachers to introduce that cool app to motivate the kids and give them a better sense of geometry, but then they have to use it for exercises and the magic gone.
I'm not so sure I would have been a big geogebra fan in these circumstances.

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When geometry is taught on a blackboard, the teacher tells you to imagine how the figure would change if you moved this point or changes that angle.
Geogebra makes this real, and when I first used it I thought I would have loved it as a kid. It was magic!

The visual language of colors and shapes Byrne used to identify the various objects seems rather efficient.
Maybe it's the habit, but I must admit I'm a bit disturbed by the total absence of letters to label the objects though.

I have a similar feeling with functional code where functions calls are chained without ever affecting the result to a variable.
I like when things are named (but again, maybe it's just a matter of habit)

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Nicholas Rougieux ( c82.net ) made a super polished web version of the books: c82.net/euclid/
The making-of is even more impressive:

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I named this project after Euclid's Elements en.m.wikipedia.org/wiki/Euclid , the founding books of Euclidean geometry.

I don't know much about the original version but Byrne's 1847 edition displays a very innovative association of geometry and graphic design

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I'm working on a tool for exploring geometric constructions.
The repo is here: github.com/grgrdvrt/elements
I find this domain captivating on many levels (code, maths, aesthetics, education...), I'll share some thoughts as I progress on the development

Tetris on the left, Snake on the right. You play both at the same time.
With the same controls.
You lose in one, you lose in both. Good luck.


@Kouma trop cool j'ai un follower ! Bon si.on c'est un peu calme ici non?

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