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i2geo.net

(updated)

Version 28.1 by Paul Libbrecht, edited on Oct 10, 2016 7:57:18 AM.

Description:

Aktuell in der Mathewerkstatt:
  • heute 3D-Vision und -Zeichnen mit einem Haus
  • Nächste Montage im Herbst 2016:
    • 26.9.: keine
    • 10.10.: ja
    • (Ferien und Tag der Einheit)
    • 7.11.: keine
    • 14.11.: ja
    • 21.11.: nein
    • 28.11.: ja
    • 5.12.: ja
    • 12.12.: ja
Fragen und Anregungen: paul@hoplahup.net.

(updated)

Version 72.1 by public, edited on Oct 6, 2016 8:35:43 PM.

Description:

a collection of slides of CADGME 2016. They have been uploaded by the participants during the CADGME 2016 conference in Targu Mures, Romania in September 2016.



Please ask Paul Libbrecht if you want to upload more.

Slides list

QuaresmaSantosAdaptive-Strategies-in-the-Web-Geometry-Laboratory.pdf
QuaresmaSantosAdaptive-Strategies-in-the-Web-Geometry-Laboratory.pdf
PaulLibbrecht-MatijaLokar-CopyNPaste-Expectations.zip
PaulLibbrecht-MatijaLokar-CopyNPaste-Expectations.zip
presentationOfCADGME2018.pdf
presentationOfCADGME2018.pdf
neuper-Reasoning-with-CAS-.pdf
neuper-Reasoning-with-CAS-.pdf
neuper-Engineering-Math-.pdf
neuper-Engineering-Math-.pdf
GeoGebraToolswithProofCapabilities-Solyom-GecseCsilla.pdf
GeoGebraToolswithProofCapabilities-Solyom-GecseCsilla.pdf
PerdroQuaresmaIntelligent-Dynamic-Geometry-in-Education.pdf
PerdroQuaresmaIntelligent-Dynamic-Geometry-in-Education.pdf
AutomaticDiscoveryinGeoGebra-Solyom-GecseCsilla.pdf
AutomaticDiscoveryinGeoGebra-Solyom-GecseCsilla.pdf
El-Demerdash-et-al-Presentation.pdf
El-Demerdash-et-al-Presentation.pdf
El-Demerdash-el-al-Poster.pdf
El-Demerdash-el-al-Poster.pdf
Perjesi-HamoriSarvari.pdf
Perjesi-HamoriSarvari.pdf
DENYSSTOLBOV.zip
DENYSSTOLBOV.zip
Lokar-Libbrecht-CopyPasteUseless.pdf
Lokar-Libbrecht-CopyPasteUseless.pdf
Jerse-Lokar-ProjectTomo.pdf
Jerse-Lokar-ProjectTomo.pdf
MagajnaTechnologyProof.pdf
MagajnaTechnologyProof.pdf
kanekoKetCindy.pdf
kanekoKetCindy.pdf
BogyaSzilassiHypGeom.zip
BogyaSzilassiHypGeom.zip
BogyaCardGameFiniteProjPlane.zip
BogyaCardGameFiniteProjPlane.zip
2016-CADGME-Karsai-Talk-modeling.rar
2016-CADGME-Karsai-Talk-modeling.rar
Karsai-Delay-withMMA.rar
Karsai-Delay-withMMA.rar
Karsai-Szenasi-Vizi-Posfai-modelingcourse-poster.pdf
Karsai-Szenasi-Vizi-Posfai-modelingcourse-poster.pdf
MisfeldtKeynote.pdf
MisfeldtKeynote.pdf
hunornagyGeoGebramiddleschtgmures.ppt
hunornagyGeoGebramiddleschtgmures.ppt
ValentynaPikalovaGGPython.pdf
ValentynaPikalovaGGPython.pdf
KouropatovOvodenkoHershkovitzCADGME201681.pptx
KouropatovOvodenkoHershkovitzCADGME201681.pptx
Conference-Schedule.pdf
Conference-Schedule.pdf
LiudmylaGryzunUkraineWorkshop.zip
LiudmylaGryzunUkraineWorkshop.zip
CADGME2016-Question-Time.pdf
CADGME2016-Question-Time.pdf
CADGME2016-Closing.ppt
CADGME2016-Closing.ppt
Satoshi-Producing-Class-Materials-with-KetCindy.pdf
Satoshi-Producing-Class-Materials-with-KetCindy.pdf
Bokhove-Design-Books-Feedback.pptx
Bokhove-Design-Books-Feedback.pptx
TessellationsinlowersecondaryschoolclassesMartinGunzel.pptx
TessellationsinlowersecondaryschoolclassesMartinGunzel.pptx

new resource:

Version 2.1 by Martin G Günzel, edited on Oct 6, 2016 8:29:13 PM.

Description:

In this article the authors want to present a project that was realized at their lower secondary school. The aim of the project was to use inquiry based learning to introduce tessellations to the pupils. This article presents the materials that were created for the project together with teachers experience from the actual lessons. The first lessons were focused on students’ motivation and also revision. Pupils recapitulated or learned some important facts from geometry that are necessary to understand and work with tessellations. In the second part of the project, pupils were instructed to create three versions of a tessellation: a traditional construction, a computer construction and an actual model that would cover their desk. The criteria for the following evaluation of pupils’ work were: use of mathematical knowledge, originality, accuracy, beauty and team-work. During the project pupils had to work individually but at the same time as a team. They had to observe, learn and use their knowledge to complete the goal. The results of their work are presented in this article as well.

(updated)

Version 5.1 by Paul Libbrecht, edited on Sep 19, 2016 5:58:51 AM.

Description:

Une simple maison en axonométrie servant de base pour construire, par exemple, un toit par dessus ou une extension. Cette maison est tirée de iso city unit grey sur open cliparts.

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Version 7.1 by Paul Libbrecht, edited on Sep 19, 2016 5:53:11 AM.

Description:

Quelques ressources pour l'atelier maths à propos de géométrie de l'espace.

Discussions élémentaires de positions relatives.

Stratégies de dessin.

(updated)

Version 12.1 by Paul Libbrecht, edited on Sep 19, 2016 5:52:34 AM.

Description:

quelques ressources de géométrie niveaux 5_6ème

new resource:

Version 2.1 by Liudmyla Gryzun LuGr, edited on Sep 11, 2016 6:41:43 PM.

Description:

CADGME_Workshop Materials

(updated)

Version 6.1 by Paul Libbrecht, edited on Jun 1, 2016 9:01:58 AM.

Description:

Il s'agit de distribuer un motif au long d'un cercle en logo et, par là, de raisonner sur les fractions.

(updated)

Version 28.1 by Paul Libbrecht, edited on May 30, 2016 12:18:46 PM.

Description:

Quelques candidates que l'on pourrait utiliser à l'atelier Math/Mathe-Werkstatt du Lycée Franco-Allemand/Deutsch-Französisches-Gymnasium.

(updated)

Version 3.1 by Paul Libbrecht, edited on May 30, 2016 12:16:26 PM.

Description:

xx

(updated)

Version 4.1 by Paul Byache, edited on May 24, 2016 3:46:15 PM.

Description:

Ce fichier est à utiliser avant le fichier de "Sassenou Université" : http://i2geo.net/xwiki/bin/view/Coll_clemences/Sinusetcosinus

NOTICE :

travail préalable : révisions de 3ème

  • remarquer que dans des triangles rectangles d'hypoténuse 1, on peut calculer un peu plus facilement le cosinus et le sinus.
  • Étudier en détails le cas d'un triangle rectangle d'hypoténuse 1 dont un des angles mesure 45° (en utilisant le fait qu'il est isocèle + Pythagore)
  • Étudier en détails le cas d'un triangle rectangle d'hypoténuse 1 dont un des angles mesure 60° (en utilisant le fait qu'en ajoutant son symétrique, on obtient un triangle équilatéral)
  • Étudier en détails le cas d'un triangle rectangle d'hypoténuse 1 dont un des angles mesure 30° (facile à partir du cas précédent)
fichier « preambule » :

  • on a un triangle rectangle d'hypoténuse 1 et dont on connaît la mesure d'un angle aigu
  • on met ce triangle dans un cercle de rayon 1 comme sur la figure
  • COMMENT CALCULER LE COSINUS ET LE SINUS DE l'angle AOB ?
  • ainsi, le cosinus et le sinus sont simplement les coordonnées du point A (grâce à la longueur de l'hypoténuse : 1)
INTERET 1 :
  • cette construction fonctionne quelle que soit la mesure de l'angle aigu AOB choisi. MAIS elle peut permettre de généraliser cela a des valeurs inférieures à 0° ou supérieures à 90°
INTERET 2 :
  • l'arc AC est proportionnel (en longueur) à la mesure de l'angle. Cela permet donc d'envisager une nouvelle unité d'angle que les degrés ou que le « tour » : cette unité est appelée le radian
  • Combien vaut 360° en radians ? Et 180° ? et 90° ?
REMARQUE :
  • si on déroule l'arc AC, on visualise mieux sa longueur, sur l'axe gradué passant par C.
fichier de : http://i2geo.net/xwiki/bin/view/Coll_clemences/Sinusetcosinus

  • on veut définir le cosinus et le sinus pour n'importe quel nombre
  • on procède à l'envers par rapport au fichier précédent
  • on enroule l'axe sur le cercle
  • le cos et le sinus sont les coordonnées du point M'
  • l'ordonnée du point M est une mesure en radians de l'angle IOM'
  • le cos et le sin d'un nombre sont donc ceux des angles dont la mesure en radians est égale à ce nombre
  • QUELLES SONT LES VALEURS de cos x et sin x pour x=pi ; pi/2 ; etc. ?

(updated)

Version 6.1 by Paul Libbrecht, edited on Mar 24, 2016 3:18:22 PM.

Description:

the project 3s

(updated)

Version 69.1 by Heiko Vogel, edited on Feb 7, 2016 7:20:10 PM.

Description:

Die Koordinaten verschiedener Vierecke können in vorgegebene Richtungen verändert werden. Es ist zu untersuchen, ob die entstehenden Vierecke zu den ursprünglichen kongruent sind.

This resource is a test

(updated)

Version 12.1 by Sina Cirillo, edited on Feb 2, 2016 3:45:36 PM.

Description:

Simple Past and Past Perfect - Arbeitsblatt und Links.

(updated)

Version 3.1 by C. Hurter, edited on Feb 2, 2016 3:45:35 PM.

Description:

In dem untenstehenden Link sind Arbeitsblätter und hilfreiche Links zum Thema "einfaches Prozentrechnen".

(updated)

Version 4.1 by Sina Cirillo, edited on Feb 2, 2016 3:24:06 PM.

Description:

Arbeitsblatt zu fixen und variablen Kosten

(updated)

Version 4.1 by Sina Cirillo, edited on Feb 2, 2016 3:23:34 PM.

Description:

Es wird für Interessierte eine Anleitung dargestellt wie ein Diagramm in Excel erstellt werden kann in schrittweiser Darstellung aufgezeigt.

(updated)

Version 8.1 by Paul Libbrecht, edited on Jan 18, 2016 12:53:09 PM.

Description:

quelques ressources de l"atelier maths pour lesfractions et leur copains.

(updated)

Version 26.1 by Daniel Mentrard, edited on Jan 18, 2016 12:52:10 PM.

Description:

Une page de drill pour le calcul des sommes de nombres positifs et négatifs.

Une simple page HTML où le javascript pose un problème aléatoire, vérifie la réponse, et compte le score. Il vient des [activités de Daniel Mentrard sur les Calculs numériques.

Ce n'est jamais fini… c'est sans doute à utiliser comme exercice de drill.

On peut l'utiliser facilement en ouvrant le fichier index.html dans le zip, en cliquant simplement le bouton "démarrer", ou en suivant l'URL de ce bouton.

new resource:

Version 2.1 by Marcela Vélez, edited on Jan 10, 2016 11:27:23 PM.

Description:

Es la solución a un taller propuesto

(updated)

Version 5.1 by Paul Libbrecht, edited on Jan 4, 2016 1:49:56 PM.

Description:

Représentation des fractions avec des parts de gâteau.

On peut jouer cette animation direct en ligne.

(updated)

Version 4.1 by Philipp Lust, edited on Dec 8, 2015 2:46:02 PM.

Description:

Klassenstufe: 6/7

Dieses Dokument enthält eine lose Stundenskizze zur Einführung der Programmiersoftware "Scratch" in der Klassenstufe 6 und 7. Es enthält zudem ein von mir entworfenes Presetprogramm, mit dem die SuS arbeiten können. Außerdem finden Sie einen Link zur Downloadseite der Freeware, sowie Lizenzinformationen zu derselbigen.

Bitte wenden Sie sich bei Fragen direkt an mich.

Viel Spaß mit dem Material!

Philipp Lust

new resource:

Version 2.1 by Gözde Celikörs, edited on Dec 8, 2015 2:42:53 PM.

Description:

kurze Einfühung und Aufgaben

(updated)

Version 7.1 by Corinna Hurter, edited on Dec 8, 2015 2:42:08 PM.

Description:

Diese Ressource wurde in deutscher Sprache für das Fach Mathematik erstellt. Es wurden Creative Common Ressourcen verwendet.

Schnelles Einblick

new resource:

Version 2.1 by Bahar Topuz, edited on Dec 8, 2015 2:39:16 PM.

Description:

Thema: Mobbing … ohne Ändeung!

(updated)

Version 10.1 by Armin Kreck, edited on Dec 8, 2015 2:34:22 PM.

Description:

Diese Ressource ist in deutscher Sprache zum Unterricht an gewerblichen Schulen im Fach Computertechnik konzipiert. Es geht um Programmierung von Fallunterscheidungen, hier im Speziellen um IF-ELSE und Case-Switch in der Programmiersprache Java. Es werden Creative Commons Ressourcen wiederverwendet.

new resource:

Version 2.1 by Larissa Nudischer, edited on Dec 8, 2015 2:26:26 PM.

Description:

auf Englisch

(updated)

Version 3.1 by Paul Libbrecht, edited on Nov 2, 2015 2:43:32 PM.

Description:

  • On choisit une image simple à imiter: par exemple sur http://openclipart.org ou on en dessine une sois-même.
  • On écrit la "recette" (avec: segments, points, angles, cercles).
  • On la transmet à son voisin.
  • Il la redessine, avec l'équerre, le crayon, et le compas.
  • On compare
  • Éventuellement, le voisin peut implémenter cela dans le logo qui est en lien.

(updated)

Version 4.1 by JOSE IGNACIO MIGUEL DIAZ, edited on Oct 15, 2015 7:44:27 PM.

Description:

  • Actividades interactivas de geometría para alumnado de Educacion Primaria.
  • Las propuestas estan secuenciadas y cada una de ellas tiene un objetivo concreto
  • Son propuestas de trabajo para que descubran conceptos, propiedades, se subsanen algunos errores, etc., todo ello mediante la observacion y manipulacion de diferentes objetos geometricos.
  • No se trata de redescubrir las matematicas, sino de inmiscui­rse en sus entresijos, de experimentar con ella, de aportar y desarrollar nuestra imaginacion, nuestras dotes de observacion y podamos posteriormente deducir y generalizar.

(updated)

Version 4.1 by Paul Libbrecht, edited on Oct 5, 2015 12:09:51 PM.

Description:

Dinge daneben.

(updated)

Version 6.1 by Colin McAllister, edited on Jun 22, 2015 12:20:32 PM.

Description:

Explore the symmetry and combinations of asymmetric tetrahedra that have integer and prime number edge lengths. This short article introduces the topic, suggests practical projects and further reading. Links to resources on i2geo.net for Geogebra geometry templates and PNG images for printing out the paper templates. Recommended for school projects in mathematics or geometry for a range of age groups, or for anyone interested in recreational geometry or compass and straightedge construction. From 15 June 2015 blog post at http://cmcallister.typepad.com/ Thanks to Dr. Diana S. Perdue and Dr. Linda Fahlberg-Stojanovska for inspiration and advice.

new resource:

Version 2.1 by Colin McAllister, edited on Jun 22, 2015 12:05:41 PM.

Description:

CaRMetal geometry file to make a paper template for an asymmetric prime-edged tetrahedron. The relative edge lengths are prime numbered integers: 3, 5, 7, 11, 13, 17. Created using CaRMetal interactive geometry software: http://db-maths.nuxit.net/CaRMetal/index_en.html The ZIR file for CaRMetal is also on this website. Geogebra tetrahedra are also shared on this website, and are better for cutting out and folding to form solid tetrahedra.

(updated)

Version 7.1 by Colin McAllister, edited on Jun 17, 2015 7:54:27 PM.

Description:

Slideshow about paper-folding (origami) using Interactive Geometry Software. The geometry of folding paper circles and triangles is explored and simulated. The research paper (PDF) and data files for Geogebra, Dr Geo and CaRMetal on are available for download on http://i2geo.net (search for paper-folding).

new resource:

Version 2.1 by Colin McAllister, edited on Jun 17, 2015 7:23:12 PM.

Description:

CaRMetal geometry file to make a paper template for an asymmetric prime-edged tetrahedron. The relative edge lengths are prime numbered integers: 3, 5, 7, 11, 13, 17. Open the ZIR file with CaRMetal interactive geometry software: http://db-maths.nuxit.net/CaRMetal/index_en.html Export to a SVG or PNG image file for convenient printing. Geogebra version of this file is also shared on this website. The generated PNG file showing four triangles is also shared on this website Scale to fill the page before printing. Centimetre scale fits A4 or Letter size paper. Folds into a solid tetrahedron shape with four unequal triangular faces. Before cutting out, draw tabs around the perimeter edges for gluing. Crease the sides of the triangles and fold. Fold in opposite direction for mirror image solid.

(updated)

Version 5.1 by Colin McAllister, edited on Jun 12, 2015 6:54:49 PM.

Description:

Geogebra file to make a paper template for an asymmetric integer-edged tetrahedron. Export to PNG image file for convenient printing. Lines of construction are hidden. The generated PNG file showing four triangles is also shared on this website. Scale to fill the page before printing. Inch scale fits A4 or Letter size paper. Folds into a solid tetrahedron shape with four unequal triangular faces. Before cutting out, draw tabs around the perimeter edges for glueing. Crease the sides of the triangles and fold. Fold in opposite direction for mirror image solid. A different tetrahedron with the same edge lengths is also on this website.

(updated)

Version 5.1 by Colin McAllister, edited on Jun 12, 2015 6:54:24 PM.

Description:

Paper template for an asymmetric integer-edged tetrahedron. Scale to fill the page before printing. Inch scale fits A4 or Letter size paper. Folds into a solid tetrahedron shape with four unequal triangular faces. Before cutting out, draw tabs around the perimeter edges for glueing. Crease the sides of the triangles and fold. Fold in opposite direction for mirror image solid. Created from a Geogebra file (ggb) which is also shared on this website. A different tetrahedron with the same edge lengths is also on this website.

(updated)

Version 4.1 by Colin McAllister, edited on Jun 12, 2015 6:53:52 PM.

Description:

Geogebra file to make a paper template for an asymmetric integer-edged tetrahedron. Export to PNG image file for convenient printing. Lines of construction are hidden. The generated PNG file showing four triangles is also shared on this website. Scale to fill the page before printing. Inch scale fits A4 or Letter size paper. Folds into a solid tetrahedron shape with four unequal triangular faces. Before cutting out, draw tabs around the perimeter edges for gluing. Crease the sides of the triangles and fold. Fold in opposite direction for mirror image solid. A different tetrahedron with the same edge lengths is also on this website.

(updated)

Version 4.1 by Colin McAllister, edited on Jun 12, 2015 6:53:27 PM.

Description:

Paper template for an asymmetric integer-edged tetrahedron. Scale to fill the page before printing. Inch scale fits A4 or Letter size paper. Folds into a solid tetrahedron shape with four unequal triangular faces. Before cutting out, draw tabs around the perimeter edges for gluing. Crease the sides of the triangles and fold. Fold in opposite direction for mirror image solid. Created from a Geogebra file which is also shared on this website. A different tetrahedron with the same edge lengths is also on this website.

(updated)

Version 4.1 by Colin McAllister, edited on Jun 12, 2015 6:52:53 PM.

Description:

Paper template for an asymmetric prime-edged tetrahedron. The relative edge lengths are prime numbered integers: 3, 5, 7, 11, 13, 17. Scale to fill the page before printing. Centimetre scale fits A4 or Letter size paper. Folds into a solid tetrahedron shape with four unequal triangular faces. Before cutting out, draw tabs around the perimeter edges for gluing. Crease the sides of the triangles and fold. Fold in opposite direction for mirror image solid. Created from a Geogebra file which is also shared on this website. A tetrahedron with sequential integer edge lengths is also on this website.