A very Nb-based mathematical drawing tool-geogebra

Official Website:

Http://www.geogebra.org/cms/zh_TW/

 

Http://baike.baidu.com/view/3086671.htm

Geogebra is a free and cross-platform dynamic mathematical software that provides educational use at all levels, including ry, algebra, tables, graphics, statistics, and calculus, and is concentrated in an easy-to-use software. It has won several European and American Educational Software awards.

 

 

Geogebra is a dynamic mathematical software that combines ry, algebra, and calculus. It was designed by Markus hohenwarter, a professor of mathematics at the University of Atlanta, Florida. On the one hand, geogebra is a dynamic ry software. You can draw points, vectors, line segments, straight lines, polygon, cone curves, and even functions on the top. Afterwards, you can change their attributes. On the other hand, you can directly input equations and coordinate points. Therefore, geogebra
It also has the ability to process variables (these variables can be numbers, angles, vectors, or coordinate points), and it can also perform differentiation and integration on functions, find the root of the equation or the maximum minimum value of the computed function. Therefore, geogebra has the ability to process both algebra and ry. Therefore, there is an "Algebra area" on the left side of the geogebra window and a "ry area" on the right side (also known as the "plotting area 」), just like. Edit this section

 

QUADRATIC FUNCTION

The following is an introduction to several windows:

You can use the ing tool in the toolbar to draw a geometric window with the mouse in the geometric area. Select one of the drawing tools from the toolbar, and you can use the Tool tips (after the toolbar) to learn how to use the selected tool. Any object generated in the geometric area has an algebraic feature in the algebraic area. Note: You can move objects in the geometric area by dragging the mouse. The algebraic features in the algebraic area are also dynamically updated. Each icon in the toolbar represents a tool box. The tool group contains some plotting tools with similar functions. You can use the left mouse button to open the tool box by clicking the small arrow in the lower right corner. Tip: plotting tools are classified based on the nature of the generated objects. For example, you can generate different types of points in the tool box (the default icon is) and the tool box for geometric Transformation (the default icon is. The algebra window can directly enter an Algebra Expression in the geogebrar command area, and press enter, the entered Algebra Expression will appear in the algebra area, and the corresponding figure will appear in the ry area. In the algebra area, mathematical objects are classified as free objects and derived objects. If an object is generated without any existing object, it is classified as a free object. If the new object is generated using another existing object, it is classified as a derived object. Tip: If you want to hide a feature in the algebra area, you can specify the object as an auxiliary object. In the algebra area, right-click the object, right-click a secondary object, or select Properties in the pop-up menu. In the Properties dialog box, select basic ", check the box before the "Secondary object" option. By default, the "helper object" is not displayed in the algebra area, but you can select "helper object" in the "View" menu ", then we can see it in the algebra area. Objects in the algebra area can be modified: First confirm that the selected MobileTool, and then double-click the object in the algebra area, you can directly edit the Algebraic Feature data of the object in the text box, and then press enter, the graphical features of the object will change. If you double-click a derived object in the algebra area, you can "redefine" the object in the displayed dialog box. Geogebra also provides many commands. you can press the 'command' button on the right of the command area to open the command window table. Select a command from the menu (or directly enter the command in the command input box ), press the F1 key to obtain the syntax structure and required parameters of the command. The Worksheet window is in the worksheet area of geogebra. Each cell has a specified name to specify the position of the cell. This is similar to the office worksheet. For example, the name of the cell in row 1st of column A is A1. Note: When the cell name is used in expressions or commands, the cell name represents the content data in the cell, this process is called cell data reference. In a worksheet, you can enter not only numeric values, but also mathematical objects supported by geogebra, such as coordinate, function, and command of points. For a mathematical object entered in a worksheet, geogebra immediately displays its graphical features in the geometric area, and the object name corresponds to the position in the worksheet, such as A5 and C3. Note: by default, objects in the worksheet are classified as auxiliary objects in the algebra area.