[i]GeoGebra [/i]offers algebraic input and commands in addition to the [i]Graphics Tools[/i]. Every [i]Tool [/i]has a matching [i]Command[/i] and therefore, could be applied without using the mouse.[br][br][b]Note:[/b] [i]GeoGebra [/i]offers more [i]Commands [/i]than [i]Graphics Tools[/i]. Therefore, not every [i]Command [/i]has a corresponding [i]Graphics Tool[/i]![br][br]Commands can be typed into the [i]Input Bar[/i]. They are followed by a set of parentheses (or brackets) containing the parameters necessary for the command.[br][br][b]Example:[/b] The command [math]Polygon\left(A,B,C\right)[/math] creates a polygon using the existing points [i]A[/i], [i]B[/i], and [i]C[/i].[br][br][b]Hint: [/b]If you need further information about a certain command, here you can find a full list of [url=https://wiki.geogebra.org/en/Category:Commands]commands[/url] and also[url=https://wiki.geogebra.org/en/CAS_Specific_Commands] CAS specific commands[/url]. [br]

After typing the first three letters of a command into the[i] Input Bar[/i], [i]GeoGebra [/i]tries to complete the command and shows you the required parameters within parentheses or brackets.[br][br][list][*]If [i]GeoGebra [/i]suggests the desired command, hit the [i]Enter[/i] key in order to place the cursor within the parentheses or brackets.[br][/*][*]If the suggested command is not the one you wanted to enter, just keep typing until the suggestion matches.[/*][/list][br][b]Note:[/b] After selecting a command, the first parameter is automatically highlighted and can be easily replaced with your input. To highlight the next parameter, either type a comma or press the [i]tab [/i]key.

Create three points A, B and C, then:[br][b][br]Explore the [i]Line [/i]Commands[/b][br][list=1][*]Enter [math]Line\left(A,B\right)[/math] into the[i] Input[/i] [i]Bar [/i]and press [i]Enter[/i] to create a line [i]f[/i] through points [i]A[/i] and [i]B[/i].[/*][*]Find out how to create a new line that is parallel to line [i]f[/i] through point [i]C[/i].[/*][/list][br][b]Explore the [i]Circle [/i]Commands[/b][br][list=1][*]Create a circle with center [i]A[/i] and radius 2.[/*][*]Create a circle with center [i]B[/i] through point [i]C[/i].[/*][*]Create a circle through points [i]A[/i], [i]B[/i], and [i]C[/i].[/*][/list]