Which Geogebra App Should I =LINK= Download
Terina Altmark
I have recently started to use GeoGebra for some code golf challenges involving strings, and have come across a conundrum which I want to ask the meta about, and prompts the more general question of how GeoGebra should be scored in regards to taking in input.
What should be the consensus for taking in string input in GeoGebra? Is direct insertion allowed, or is the input box required (or something else entirely)? How is the problem mentioned above factored in with all of this?
For Geogebra it seems that the only suggested input method available which meets our current guidelines is the input box. (See here.) Both insertion into the code (see here) and assignment to a variable (see here) are disallowed in general. I cannot find any reference to spreadsheet cells as an input method. I had thought it was permitted and I would support a proposal to make it a default. If it is allowed I think it should be allowed for all spreadsheet languages.
If this really bugs you, you can always make your own language which is like geogebra, but smooths over the quirks. From a quick glance it seems that at least some of Geogebra's source code is available here. It can even be a language which compiles into Geogebra.
This academic tool is a rather complicated application that is aimed strictly at those comfortable with difficult math. Speaking of which, the advantage GeoGebra can offer over similar apps is that it provides multiple representations of objects that are all dynamically linked. The idea is to connect geometric, algebraic, and numeric representations in an interactive way.
So this does not seem like a problem with Geogebra itself. The common phenomenon I met in the two problematic laptops is: Adobe Acrobat does not work and has been reinstalled, which probably has something to do with the current issue but I am not very sure.
Currently, if I double click geogebra without admin's privilege, the geogebra.exe and javaw.exe processes appear in sequence in task manager windows for 1 or 2 seconds and then disappear. Only when running as admin, the javaw.exe can be normally started.
Since I didnot backup the system for disk saving consideration and there were tooooo many details for me to recover in the registry, I decided to delete the current user account and create a completely new one, which finally solved my problem.
Now I want to know the coordinates of the point. It is defined as Intersect[l, h] which doesn't help me. I can access its coordinates too (0.8, 3.98) but I want to know how to calculate them depending on the parameters. (I'd expect it to be something like (3a, 7+b-2a)). I know GeoGebra can do this because it must have done it internally to be able to draw the whole image. But I don't know how to access this information.
If you want to get the current position of a Point P you can use the x and y commands. These will update whenever the position of P changes so that you don't have to recalculate where the point should be by hand.
I'm working as a private teacher. Sometimes I need to draw some geometric figures. Is there any free program to do that? I found from the Internet that Geogebra looks good but unfortunately I'm not sure if I am allowed to use it for commercial projects. I'm a non-native English speaker. Or should I just learn for example TikZ, _package
This program is very flexible, and can be used to show simple geometric relationships (like for instance the geometric fact that the sum of the interior angles of a triangle is 180 degrees) to very complex geometric properties (the limit of the sum of rectangles which approximate the area underneath a curve is equal to the exact area under the curve). Geogebra is then therefore useful in a wide variety of different contexts and branches of mathematics.
I am interested in using geogebra, which is a geometry software, as a drawing software. I suppose this would save me a lot of time as a replacement for drawing directly in tikz.
The options I miss most are selection (as in say gimp), and simple copy & paste.
Geogebra allows to make a copy of an object as a reflection/translation/rotation; so changing the copy is not possible. I would sometimes prefer to make a simple duplicate copy. A work-around I found was to copy from one window to another. This is not working well either (for geogebra, objects have geometrical coordinates).
Recently, GeoGebra, a mathematics education software, has entered the scene of physics education; however, research on how the software can be used to support teaching and learning physics is limited and scattered. The aim of this article is to present a review of the current literature on how GeoGebra can be used to support physics education in upper-secondary schools. The general conclusion that comes from these studies is that GeoGebra is a user-friendly software that can be operated intuitively by teachers and students. It provides an environment in which the underlying mathematical structures are always at hand, enabling users to see connections between physical phenomena and their formal representations. In addition, teachers with or without programming skills can use the software to design custom-made computer simulations and augment real experiments with virtual objects. Our intention is to help teachers who would like to start using GeoGebra or to broaden the use of the software in physics education.
GeoGebra is an open-source software, freely available from www.geogebra.org. It works on many operating systems such as Windows, MacOS, Linux, iOS, Android and also from a web browser. GeoGebra is multilingual (more than 70 languages) in its menus and its commands.
Images and text can easily be inserted into the Graphics Window, where the user can determine the length, area, or angle of an object. Another useful tool is the slider, which is a graphical representation of a free number or free angle. The slider enables users to dynamically vary the value of a parameter with a cursor. For example, these features can be used to determine the equation of the function describing the trajectory of a basketball (figure 2). Because of the dynamic link between algebraic and graphic representations, it is possible, by dragging the sliders, to examine how different values of the parameters a, h and k affect the corresponding path of the basketball. The 3D features in GeoGebra enable users to draw 3D graphs and create 3D geometric constructions. With augmented reality (AR) enabled, users can place mathematical objects on any surface and walk around them. GeoGebra can also be used to create simulations without extensions such as Flash or Java. Users do not need any programming skills to create simulations in GeoGebra, as long as they understand the mathematics behind potential simulations.
Figure 3. GeoGebra simulation of simple projectile motion retrieved from [4], and available at www.geogebra.org/u/tomwalsh, with the permission of the American Association of Physics Teachers. Available at doi.org/10.1119/1.4981047.
In addition, problems dealing with repetitive numerical computation and graphical 2D representation can be solved in GeoGebra. For example, Hasek [36] shows how to simulate the motion of a planet around the Sun using Feynman's method of numerical analysis (figure 4) which is made possible due to simultaneous interconnection between algebraic, geometric and numeric representations.
Figure 6. Motion of an object on an inclined plane augmented by a dynamic model constructed in GeoGebra, available at www.geogebra.org/m/pafx6xfu#material/qhb4yeht. Created with GeoGebra,
Figure 7. GeoGebra model of the resulting force constructed obtained by adding the force arrows of gravitational force and normal force, available at www.geogebra.org/m/pafx6xfu#material/qhb4yeht. Created with GeoGebra
Involving students in the process of modelling physical phenomena might be a starting point for discussions about the limitations of computer models. This is similar to what has been suggested in exercises with Algodoo [40], a software in which students can create simulations by using simple drawing tools such as boxes, circles, polygons, ropes, or chains. However, in comparison with Algodoo, where the underlying mathematical architecture is less accessible, GeoGebra explicitly shows the physical and mathematical modelling. The dynamic connection between the two construction forms might strengthen students' understanding of the role of mathematical modelling in physics.
Figure 11. GeoGebra simulation of friction used in the study. Overview of picture of block and hand, sliders and graph of force against time after the block has started to move, available at www.geogebra.org/m/F6GAjhpw. Created with GeoGebra,
Most of my constructs are products of my play, not constructed with teaching in mind; however, they are great for exploration and discovery of pattern and dynamical change and constancy. I initially thought about creating worksheets for the constructs but decided against it for the very reasons you presented in this post. (As an exception, my Trigonometric Laws construct does have questions which lead students to discover deeper patterns and processes, and wider connections in the Laws.)
GeoGebra (www.geogebra.org) is free dynamic mathematics software for all levels of education that brings together geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package. Interactive learning, teaching and evaluation resources created with GeoGebra can be shared and used by everyone at www.geogebratube.org.
GeoGebra is an interactive mathematics software suite for learning and teaching science, technology, engineering, and mathematics from primary school up to the university level. Constructions can be made with points, vectors, segments, lines, polygons, conic sections, inequalities, implicit polynomials and functions, all of which can be edited dynamically later. Elements can be entered and modified using mouse and touch controls, or through an input bar. GeoGebra can store variables for numbers, vectors and points, calculate derivatives and integrals of functions, and has a full complement of commands like Root or Extremum. Teachers and students can use GeoGebra as an aid in formulating and proving geometric conjectures.
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