GeoGebra is an open-source utility built specifically for helping users design mathematical objects of several types used for calculus, algebra and geometry. Since this is a Java-based application, you should make sure you have previously installed the working environment on the computer.

It sports a clean interface that allows users to create mathematical objects by using dedicated tools or commands. The application offers quick access to different drawing tools that can be inserted in the working pane pretty easily.

GeoGebra gives you the possibility to add points and vectors, and perform calculations with them (for example, you can measure the length of a vector), as well as include lines and axes, conic sections and arcs, curves, inequalities, intervals, and functions.

The app provides features for number creation and you can use the ? and Euler constants for expressions and calculations, as well as work with angles, Boolean variables, matrix operations (addition, subtraction, multiplication), embedded text messages and images.

The inserted objects can be hidden or revealed in the graphical representation, filled with a color, as well as fixed to a certain position so you cannot move, redefine or delete them. Plus, it is possible to change the name of an object, label it with its value, create animations with numbers, angles or points, and enable the tracing mode for viewing an object's position.

GeoGebra offers support for two scripting languages (GGBScript and Javascript), so you can create a sequence of commands for designing or modifying the objects. What's more, you may record the values for each object in a spreadsheet list, namely numbers, points, and vectors.

The generated projects can be saved to a file (e.g. HTML, PNG, EPS, GIF), uploaded on the developer's website, or printed.

All in all, GeoGebra comes packed with many dedicated parameters for helping you learn or teach various mathematical objects and operations.

* Captions enabled for all objects

* New option "Force Reflex Angle" forces angles to be between 180 and 360 degrees

* Pressing toggles the focus between the Input Bar and the Graphics View

* Improvements to the way translation works

* Dynamic colors (Properties -> Advanced tab). Set a function with range [0,1] for each color component (red, green, blue)

* Option for the grid to be bold

* Thumbnail saved in GGB files.

* Worksheets resized if they were saved on a larger screen

* Isometric grid

* Comparing objects of different types doesn't return an error, can now compare Text and Image objects

* If the Points Export_1 and Export_2 exist, they will be used to define the export rectangle (Export_1 and Export_2 must be within the visible area)

* Checkbox now consistent across all platforms

* Options -> Checkbox Size -> Regular/Large

* Perpendicular check added to "Relation between two objects" Tool

* Messages from "Relation between two objects" Tool rewritten

* Angular Bisector Command and Tool renamed to Angle Bisector

* Line Bisector Command and Tool renamed to Perpendicular Bisector

* BMP import

* Unicode fonts used in LaTeX equations

* LaTeX equations exported at full resolution

* in SVG and PDF export, option to export text as editable text or shapes. Stores the text either as text (lets you edit the text in eg InkScape) or as bezier curves (ie guaranteed to look the same even if the correct font is not installed).

* support for inline equations and linefeeds in LaTeX eg "if x=9 find $ sqrt{ x } $"

* Angle entered in rotate dialog box is remembered (if it is in degrees)

* Show All Objects in Graphics View menu

* Option for up to 15 decimal places

* x^0, x^1, x^7, x^8, x^9 now displayed nicely

* PGF/TikZ export

* added degree symbol to axes units

* new command-line parameter: --antiAliasing=off

* defines e to be the Euler number when used in expressions (unless it has already been defined to something else)

* templates for 2x2 and 3x3 matrix in LaTeX drop-down menu

* Option to display numbers as Significant Figures (3,5,10,15)

* New options Edit -> Select Descendents/Select Ancestors

* Double-click on an object in the Graphics View opens the redefine dialog, which now has a button to open the Properties dialog as well as 'OK' and 'Apply' buttons

* "Input Field" renamed to "Input Bar"

* "Algebra window" renamed to "Algebra View"

* "Graphics window" renamed to "Graphics View"

* Algorithm to decide which point to select added (rather than popping up a menu)

* Points in the form (a, b), (a + c, b + d) and (a + x(A), b + x(B)) are draggable (the variables a & b are updated accordingly)

* Ctrl + to zoom in, Ctrl - to zoom out

* New menu option "Recompute all Objects (F9)" which updates all the random numbers

* Set point style for lists of points

* Set line style for lists of lines

* Set filling style for lists of eg circles, polygons

* Set text style for lists of texts

* Animation of sliders

* f'(x) is automatically named f'(x) [ ie you can type just f'(x) rather than f'(x) = f'(x) ]

* Shift-right drag will now allow a zoom that allows the aspect ratio to change

* you can now set the line thickness of polygons created with eg Sequence[Polygon[(i,i),(i+1,i),(i+1,i+1)],i,1,3]

* polygons can now have line thickness 0 (ie no edges)

* In Captions, %v is replaced by the value and %n by the name, eg "The value of %n is %v"

* Captions can now be surrounded by

* Alt-click or F3: copy definition of selected object to the Input Bar

* F4: copy value of selected object to the Input Bar

* F5: copy name of selected object to the Input Bar

* Alt-scroll wheel: accelerated zoom

* Alt-dragging a selection rectangle puts a list of the objects selected in the Input Bar

* Hold down Alt when drawing a Line, Segment, Ray or Vector forces the angle to be a multiple of 15 degrees

* File -> Open shows a preview image when available

* Properties -> Color shows the color as an RGB triple in the preview pane eg (0,0,255)

* Area[Arc], Perimeter[Arc] work (treating the arc as a segment)

* sin(? x) now prints the ? nicely

* Objects are now redefined from the input bar eg A = Point[f] then A = (1,2) will now make A a free object

* Shift-double-click on a point on line/circle/function/etc in the Algebra View will allow you to set the coordinates without redefining it

* Record to Spreadsheet Tool: you can now alt-click on a Point, Vector or Number to have its value(s) copied into columns A and B

* \n replaced by newline in texts eg Text["GeoGebra\nRocks",(3,4)]

* can't have functions called sin, cos etc

* New point styles (plus, diamond, triangles)

* Size of the drawing pad in pixels can be obtained with pixelsWidth = x(Corner[5]) and pixelsHeight = y(Corner[5])

* Export to Google Gadget and MediaWiki

w2yxw.GeoGebra.Win.Installer.5.0.264.0..l98.h8u.rar.html

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w2yxw.GeoGebra.Win.Installer.5.0.264.0..l98.h8u.rar

w2yxw.GeoGebra.Win.Portable.5.0.264.0..l98.h8u.zip

w2yxw.GeoGebra.Win.Installer.5.0.264.0..l98.h8u.rar

w2yxw.GeoGebra.Win.Portable.5.0.264.0..l98.h8u.zip

w2yxw.GeoGebra.Win.Installer.5.0.264.0..l98.h8u.rar

w2yxw.GeoGebra.Win.Portable.5.0.264.0..l98.h8u.zip

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