Geogebra Clix C01

Working with the application

Getting familiar with the Geogebra interface

The above image shows you the Geogebra window. After opening Geogebra, you will see the application window as above. The user can define the graphics view in terms of the axes, the grid, scale of the axes, etc. The Move button - which allows objects to be moved is highlighted in blue.

Using the tool bar to draw an angle

In this section you will be introduced to the basic constructions available on the tool bar.

Introduction to the tool bar
2
Moving objects
Moving by rotating around a point

Drawing segments and lines
Drawing parallel lines

The Geogebra tool bar is very versatile - the construction follows the processes that we would normally follow in paper and pen construction. Some six important categories in the tool bar are discussed below:

Moving objects:Geogebra allows you to move object constructed freely by dragging the object. You can also select an object and move it by rotating aroung a point.
Plotting points: There are different ways of plotting points on the Geogebra graphics pad. You can plot a point anywhere on the graphics view - this is a free point. You can also plot on an object or as an intersection of two objects; in both the cases the point is a dependent object.
Drawing lines: The menu for lines and segments also allows multiple constructions - segments,lines, rays and vectors
Drawing multiple lines: Multiple lines can also be drawn in Geogebra. Parallel lines, perpendicular lines, angle bisectors and perpendicular bisectors can be drawn.

Measuring an angle

Measuring an angle

The above set of images show how to measure angles in Geogebra.

Typing text in a textbox

Using the text box

</gallery> The textbox is used to write descriptive text in a Geogebra file. The first image shows you the option in the tool bar which will be used to insert a text box. After selecting the text box option, you can click anywhere on the graphics pad to insert the text box. The next two images show how symbols and prior defined objects can be inserted. For example, in the third image, the "α" object is a prior defined object - the angle measure. This feature allows the text box to dynamically capture the changes in the Geogebra file.

Using the tool bar - slider

One of the powerful features of Geogebra is the dynamic feature. You can vary parameters of the shape that you want to animate and see how properties change.

Using the slider
Defining the slider
Polygon with a slider for number of sides

3D view

Using the 3D window
3D view
Extruding a prism from the polygon

The 3D window allows you to visualize the geometry along 3-axes. You can rotate the graphics view using the same icon that you used for the Move graphics view. You can independently work on the 2D and 3D windows and the construction on one window will get reflected in the other.
The 3D window allows you to construct solid figures by extruding from a 2-dimensional shapes. Other features include construction of a plane, rotation, reflection., etc. The slider defined in the 2D window will help animate in the 3D window also.

Using Geogebra to make a given sketch

You have learnt many functionalities. An example of how to use these different tools to create a Geogebra construction can be found here.

Saving and exporting

You can save Geogebra file from the File menu.
You can also export the Geogebra file as an image (.png format) or as an animated graphic (.gif format).
If you export the Geogebra file as html you can publish it on the repository for Geogebra files.

Advanced features

Creating your own tool in Geogebra
Making three dimensional animations
Exporting Geogebra pages as html to add to the repository of Geogebra materials

Ideas for resource creation

Geogebra sketches for demonstrating different problems in geometry
Geogebra can be combined with screencast recording to create a video recording of a lesson with a Geogebra file; this can be used for students' self learning as well.

References

|}