In this chapter, you are going to work with the following tools. Please make sure you know how to use them and try them out below prior to working on the following tasks.[br][u]Hints[/u]: [br][list][*]You may [b]activate a [/b][i][b]Tool[/b] [/i]by clicking on the button showing the corresponding icon.[br][/*][*]GeoGebra's [i]Tools[/i] are [b]organized in [i]Toolboxes[/i][/b], containing similar [i]Tools, [/i]or [i]Tools [/i]that generate the same type of new object. [/*][*]You can [b]open a [/b][i][b]Toolbox[/b] [/i]by clicking on a [i]Tool [/i]button and selecting a [i]Tool [/i]from the appearing list.[br][/*][*]When you select a [i]Tool[/i], a [b][i]Tooltip [/i]appears[/b] explaining how to use this [i]Tool[/i].[br][/*][*]If you want to [b]learn more about a [i]Tool[/i][/b], click on the [i]Tooltip[/i]. This opens a web page providing more detailed information for the selected [i]Tool[/i].[br][/*][/list][br][table][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/e/e3/Mode_join.svg/120px-Mode_join.svg.png[/icon][/td][td][b]Line[/b][br]Click twice in the [img]https://wiki.geogebra.org/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i] or on two already existing points in order to create a line through these points.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/c/c3/Mode_parallel.svg/120px-Mode_parallel.svg.png[/icon][/td][td][b]Parallel Line[/b][br]Click on an already existing line and a point in order to create a parallel line through this point.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/f/f3/Mode_intersect.svg/120px-Mode_intersect.svg.png[/icon][/td][td][b]Intersect[/b][br]Click on the intersection point of two objects to get this one intersection point. Successively click on both objects to get all intersection points.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/8/8a/Mode_polygon.svg/120px-Mode_polygon.svg.png[/icon][/td][td][b]Polygon[/b][br]Click in the [i][img]https://wiki.geogebra.org/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] Graphics View[/i] or on already existing points in order to create the vertices of a polygon. Connect the last and first vertex to close the polygon! [br][u]Note[/u]: Always connect vertices counterclockwise![/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/8/83/Mode_move.svg/120px-Mode_move.svg.png[/icon][/td][td][b]Move[/b][br]Drag a free object to change its position.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/0/0c/Mode_segment.svg/120px-Mode_segment.svg.png[/icon][/td][td][b]Segment[/b][br]Click twice in the [img]https://wiki.geogebra.org/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i] or select two already existing points in order to create a segment between them.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/7/7e/Mode_orthogonal.svg/120px-Mode_orthogonal.svg.png[/icon][/td][td][b]Perpendicular Line[/b][br]Click on an already existing line and a point in order to create a perpendicular line through this point.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/1/14/Mode_pointonobject.svg/120px-Mode_pointonobject.svg.png[/icon][/td][td][b]Point on Object[/b][br]Click on an already existing object in order to create a point on this object.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/f/fb/Mode_circle2.svg/120px-Mode_circle2.svg.png[/icon][/td][td][b]Circle with Center through Point[br][/b]Your first click creates the center, while your second click determines the radius of the circle.[/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/2/25/Mode_showhideobject.svg/120px-Mode_showhideobject.svg.png[/icon][/td][td][b]Show / Hide Object[/b][br]Highlight all objects that should be hidden, then switch to another tool in order to apply the visibility changes![/td][/tr][tr][td][icon]https://wiki.geogebra.org/uploads/thumb/3/30/Mode_angle.svg/120px-Mode_angle.svg.png[/icon][/td][td][b]Angle[/b][br]Click on the points in counterclockwise direction! GeoGebra always creates angles with mathematically positive orientation.[/td][/tr][/table]