GeoGebra

GeoGebra

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  • Mr. Witkowsky's avatar
    How do you find the perimeter of a polygon using Geogebra? Thanks for your help.
    • Mr. Weissburg - If you create an actual polygon (using the tool) you can click on it with the "distance/length" tool in the menu. The perimeter will show up. You could also use the input box to find "p = a + b + c .." etc and then display this using the text tool.

      • Apr 16, 2014
  • My Name Is Ron Hyde :-)'s avatar
    Get your students ready for the big test!!!
    Help your class get pumped up about taking the test by watching one of our now two Macklemore Parodies.
    2013: Rock that Assessment (Thrift Shop)
    2014: Glass Ceiling (Can't Hold Us)

    We hope your class has as much fun watching it as we did making it.

    Enjoy,
    My name is Mr. Hyde

    Get your students ready for the big test!!!
    Help your class get pumped up about taking the test by watching one of our now two Macklemore Parodies.
    2013: Rock that Assessment (Thrift Shop)
    2014: Glass Ceiling (Can't Hold Us)

    We hope your class has as much fun watching it as we did making it.

    Enjoy,...
    Show Full Post
  • Mr. Ramanathan's avatar
    At our school we keep entrance test on Science , English and Maths for the new admission students to check their entry level irrespective of curriculum. Presently we give them hard copies of the questions papers and make them write on the sheet and we give it to the respective teachers for correction and get it back and do the marks entries and conclude the admission.
    I found it really difficult.
    I am thinking to keep the entire assessment process on line so that the tool does the self grading and brings our easy.
    i myself found some websites like https://testmoz.com/ , http://www.thatquiz.org/ , http://www.aplusclick.com/
    But i find mostly all the above websites for maths.
    Any ideas about tools or websites to keep online entrance assessment (for science and English)
    I would like to know what ideas you follow for the above issue.
    At our school we keep entrance test on Science , English and Maths for the new admission students to check their entry level irrespective of curriculum. Presently we give them hard copies of the questions papers and make them write on the sheet and we give it to the respective teachers for correction and get it back and do the marks entries and conclude the admission.
    I found it really difficult.
    I am thinking to keep the entire assessment process on line so that the tool does the self grading and brings our easy.
    i myself found some websites like ...
    Show Full Post
    • Mrs. Locci - I use google app module. It's easy create module and past it to student.

      • Mar 10, 2014
  • Mr. Tilston's avatar
    Has anyone used the Geogebra app on ipad with classes? I'm keen to use it but am struggling to do some of the most basic things on the app version.

    Is it possible to change the scales on the axes? I can zoom in and out but it changes both axes by the same amount. Can I get an x axis from -10 to 10 and a y-axis from 0 to 200 for example?

    Also is it possilbe in the app to graph trig functions in degrees? I know how to do it on the computer but it requires the use of the "alt" key which doesn't exist on the ipad.

    Any help/advice greatly appreciated.
    Has anyone used the Geogebra app on ipad with classes? I'm keen to use it but am struggling to do some of the most basic things on the app version.

    Is it possible to change the scales on the axes? I can zoom in and out but it changes both axes by the same amount. Can I get an x axis from -10 to 10 and a y-axis from 0 to 200 for example?

    Also is it possilbe in the app to graph trig functions in degrees? I know how to do it on the computer but it requires the use of the "alt" key which doesn't exist on the ipad.

    Any help/advice...
    Show Full Post
    • GeoGebra - Hi,
      * there is no button / gesture to change axes ratio at the moment, you can type SetAxesRatio[360,1] in input bar. We would like to improve that for next release -- https://dev.geogebra.org/trac/ticket/4166 .
      * the degree symbol is among the symbols below the input bar (on the left side of pi), so you can type sin(x°).
      Cheers,
      Zbynek

      • Feb 14, 2014
    • Mr. Tilston - Thanks - that's a massive help. I can't belive i didn't see the degree symbol!
      Is it possible to determine the scales on the axes? Eg set the intervals for the scale on the x axis to be 30 or 90 rather than the 50 or 100 it snaps to?

      • Feb 14, 2014
  • Mr Josh Gold's avatar
    Help!

    I am trying to create a geogebra activity for area of parallelograms. I want to start with the kids being able to drag a base along a line and see the area change. The issue I am having is that point can move vertically as well as horizontally. Can I limit it to horizontal motion? I have tried a few things, but cant seem to get this.

    Thanks!
    • Mr. Biltcliffe - You can create a horizontal line and attach the point to that line. Then if you hide the line, the point will still only be able to move horizontally.

      • Nov 27, 2013
  • Mr. Klonowski's avatar
  • Mrs. Roberts's avatar
    Anyone know anything about why the JavaWebstart version is being discontinued? My students are not allowed to download software and this has always offered us an alternative.
  • Mr. Klonowski's avatar
    My new favorite tool... FREE Assessment Data Collection and Analysis made simple for ANY content area.

    http://www.littlebullmusicblog.com/2013/11/gr...
  • Mr. Budiana's avatar
  • Mrs. Markovska Dimovic's avatar
  • Mrs. Goldman's avatar
    I'm looking for an into guide for a teacher who hasn't used it before with a class. I have some basic knowledge from other programs, but I was wondering if someone would direct me to where I might find an exploration lesson to use with student to help them learn the program. (Not a tutorial, they won't watch it!) Any activities that would get them used to using the program....also, I have a class set of iPads, can I use Geogebra on the iPads?
    • Mr. Nayak - Just a suggestion, if you invest in a teacher version of Geometer's sketchpad which is more user friendly, it has a free Ipad app that can be installed on student Ipads, which will work better. I am not sure if Geogebra would work on Ipad.
      http://www.dynamicgeometry.com/

      • Oct 8, 2013
    • Sie Gilbert - Geogebra jus released an app for the iPad and it is awesome.

      • Oct 12, 2013
  • Mr. Tysinger's avatar
    I have a foundations of geometry class that really thrives from using technology. Does anyone have some GeoGebra lessons involving graphing inequalities that they would be willing to share?

    Matthew Tysinger

    Glenn High School

    Kernersville, NC
  • Mr. Witkowsky's avatar
    I gave the following problems to my Geometry class. Here is my question for the Geogebra Edmodo group: Is it possible to define the Angle BOF (on a Geogebra construction) so that it automatically changes the degree angle to 120 degrees; and then similarly, is it possible to define Angle COG so that it again, automatically changes the angle to 35 degrees? Currently, I'm having to drag a point to each of these degree measurements, but unless you have a really steady hand, it's difficult to get it exactly to 120 degrees.

    Ray OC bisects Angle AOB, Ray OD bisects Angle AOC, Ray OE bisects Angle AOD, Ray OF bisects Angle AOE, and Ray OG bisects Angle FOC.

    1. If the measurement of Angle BOF is 120 degrees, then what is the measurement of Angle DOE?

    2. If the measurement of Angle COG is 35 degrees, then what is the measurement of Angle EOG?
    I gave the following problems to my Geometry class. Here is my question for the Geogebra Edmodo group: Is it possible to define the Angle BOF (on a Geogebra construction) so that it automatically changes the degree angle to 120 degrees; and then similarly, is it possible to define Angle COG so that it again, automatically changes the angle to 35 degrees? Currently, I'm having to drag a point to each of these degree measurements, but unless you have a really steady hand, it's difficult to get it exactly to 120 degrees.

    Ray OC bisects Angle AOB, Ray OD bisects...
    Show Full Post
    • Dr. Mauer-Oats - Everything in the construction moves as A moves, so you need to determine where to put the point A in each case so that the other angles are the measurements that you want.
      To make A go to where you want:
      -make an angle on OB with the desired measurement. Call the new point W.
      -make W and the angle WOB invisible
      When you want to set the angle A, run "A=W".
      You can probably set up buttons and scripts to do this in a fancy way, if you want.

      • Sep 20, 2013
    • Show 2 more replies...
      • Mrs. Nason - can you rotate a point on the initial side 120 degrees about the vertex, then ct a ray through that point?

        • Sep 24, 2013
      • Mr. Weissburg - You can also define a rotation in the transformation menu, and then rotate your second ray the desired amount.

        • Sep 25, 2013
    • Mrs. Casado - Club de Geogebra: Invitación a participar en el club de geogebra iberoamericano.

      Este club está abierto a todos los profesores interesados, para obtener más información ver este enlace

      http://www.ibertic.org/clubgeogebra.php

      Un saludo

      • Aug 29, 2013
  • Mrs. Casado's avatar
    Club de Geogebra: Invitación a participar en el club de geogebra iberoamericano.

    Este club está abierto a todos los profesores interesados, para obtener más información ver este enlace

    http://www.ibertic.org/clubgeogebra.php

    Un saludo
  • Mr. Schutte's avatar
    hi all , im having a bit of a problem with geogebra when using it via the chrome extension .When opening a new file i right click on the graphics to get the dialog bar and then i try to click on the graphics option and it simply does not allow me to select it by clicking . The reason i need to access this is i want to changes my axes to be suitable for a trig function marked off in 90 deg increments
  • Mr. Beyerle's avatar
    Any word on a Geogebra app for iPad? So far all I see is this link but I'm only able to make points and graph some functions in the input through Safari or Chrome. I found some applets work and some don't with geogebratube on the iPad.
  • Mr. Krishna's avatar
    When you open new geogebra window in graphics view follow the instructions below

    1. Right click and go to the last option "Graphics"

    2. Select x-axis

    3. Select "show x-axis" , "show numbers"

    4. Then choose distance: there is a drop down choice for "distance" . Choose pi/2 or Pi

    Hope this helps
    When you open new geogebra window in graphics view follow the instructions below

    1. Right click and go to the last option "Graphics"

    2. Select x-axis

    3. Select "show x-axis" , "show numbers"
    ...
    Show Full Post
  • Ms. Leonard's avatar
    I am drawing graphs of trigonometric functions and I would like to scale the x-axis so that it is in terms of pi. I know how to get it in terms of pi and even pi/2 but is it possible to have it in the form of even pi/4 or others? If it is could you please enlighten me?
    • Mr. Brady - Right click graphics view, go to x-axis, and change the distance. I can't get pi/4 to not be a decimal but pi/2 will come up in terms of pi.

      • Sep 18, 2013
  • Mr. Aguila's avatar
    Is it possible to embed a dynamic worksheet into an Edmodo post?

    • Mr. Brady - I post them on geogebratube then embed

      • Jul 11, 2013
  • Ms. Kimbrough's avatar
    Does anyone have a geogebra presentation for graphing trigonometric functions and its application?

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Dynamic mathematics for everyone

Prekindergarten - Higher Education