Create an interactive activity that allows to explore the coordinates of reflected points by inserting static and dynamic text into the [img]https://www.geogebra.org/wiki/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i].

[table] [tr] [td]1.[/td] [td][icon]/images/ggb/toolbar/mode_point.png[/icon][/td] [td]Create point [code]A = (3, 1)[/code].[/td][/tr][tr][td]2.[/td] [td][icon]https://wiki.geogebra.org/uploads/thumb/4/40/Menu_view_algebra.svg/120px-Menu_view_algebra.svg.png[/icon][/td] [td]Create line [code]a: y = 0[/code].[/td][/tr][tr] [td]3.[/td] [td][img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/32px-Stylingbar_icon_graphics.svg.png[/img][/td] [td]You might want to change the color of line [i]a[/i] to see it on top of the [i]x[/i]-axis.[/td][/tr] [tr] [td]4.[/td] [td][icon]/images/ggb/toolbar/mode_mirroratline.png[/icon][/td] [td]Reflect point [i]A[/i] about line [i]a[/i] to get its image [i]A’[/i].[br][u]Hint[/u]: You might want to match the color of line [i]a[/i] and point [i]A’[/i].[/td][/tr] [tr] [td]5.[/td] [td][icon]https://wiki.geogebra.org/uploads/thumb/4/40/Menu_view_algebra.svg/120px-Menu_view_algebra.svg.png[/icon][/td] [td]Create line [code]b: x = 0[/code].[/td][/tr] [tr] [td]6.[/td] [td][icon]/images/ggb/toolbar/mode_mirroratline.png[/icon][/td] [td]Reflect point [i]A[/i] about line b to get its image [i][/i] [i]A'[sub]1[/sub][/i].[br][u]Hint[/u]: You might want to match the color of line [i]b[/i] and point [i]A'[sub]1[/sub][/i].[code][/code][br][/td][/tr][/table]

[table][tr][td]7.[/td][td][icon]/images/ggb/toolbar/mode_text.png[/icon][/td][td]Select the [i]Text [/i]tool and click in the upper part of the [img]https://www.geogebra.org/wiki/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i]. Enter [code]Reflecting a point at the coordinate axes[/code] in the appearing dialog and click [i]OK[/i].[/td][/tr][tr][td]8.[/td][td][img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/32px-Stylingbar_icon_graphics.svg.png[/img][/td][td]You might want to use the [i]Style Bar[/i] in order to change the text formatting.[/td][/tr][tr][td]9.[/td][td][icon]/images/ggb/toolbar/mode_move.png[/icon][/td][td]Adjust the position of the [i]Text [/i]using the [i]Move [/i]tool.[/td][/tr][tr][td]10.[/td][td][img]https://www.geogebra.org/wiki/uploads/thumb/9/92/Stylingbar_object_unfixed.svg/32px-Stylingbar_object_unfixed.svg.png[/img][/td][td]Fix the position of the [i]Text [/i]so it can't be moved accidentally by using the [img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/16px-Stylingbar_icon_graphics.svg.png[/img] [i]Style Bar[/i].[/td][/tr][tr][td]11.[/td][td][icon]/images/ggb/toolbar/mode_text.png[/icon][/td][td]Create a dynamic text showing the coordinates of point [i]A[/i].[br][/td][/tr][tr][td][/td][td][/td][td][u]Hint[/u]: Select the [img]https://www.geogebra.org/wiki/uploads/thumb/1/14/Mode_text.svg/16px-Mode_text.svg.png[/img] [i]Text [/i]tool and click in the [img]https://www.geogebra.org/wiki/uploads/thumb/c/c8/Menu_view_graphics.svg/16px-Menu_view_graphics.svg.png[/img] [i]Graphics View[/i]. In the appearing dialog, type the static part of your text [code]A =[/code]. Afterwards, click on [i]Advanced [/i]and select point [i]A[/i] from the list on tab [img]https://wiki.geogebra.org/uploads/thumb/4/4e/Geogebra-logo-elipse.svg/16px-Geogebra-logo-elipse.svg.png[/img] [i]Objects[/i]. Click [button_small]OK[/button_small] when you are done.[br][/td][/tr][tr][td]12.[/td][td][icon]https://tube.geogebra.org/images/ggb/toolbar/mode_text.png[/icon][/td][td]Insert dynamic text that shows the coordinates of the reflected points [i]A'[/i] and [i]A'[sub]1[/sub][/i].[/td][/tr][tr][td]13.[/td][td][icon]/images/ggb/toolbar/mode_zoomout.png[/icon][/td][td][i]Zoom Out[/i] in order to show a larger part of the coordinate plane.[/td][/tr][tr][td]14.[/td][td][icon]https://wiki.geogebra.org/uploads/thumb/3/30/Menu-options.svg/120px-Menu-options.svg.png[/icon][/td][td]Open the [i]Properties dialog[/i] by using the [img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/16px-Stylingbar_icon_graphics.svg.png[/img] [i]Style Bar[/i] and set the distance of the grid lines to 1.[br][u]Hint[/u]: On tabs [i]xAxis[/i] and [i]yAxis[/i], check [i]Distance [/i]and enter the distance 1. [/td][/tr][tr][td]15.[/td][td][img]https://www.geogebra.org/wiki/uploads/thumb/9/92/Stylingbar_object_unfixed.svg/32px-Stylingbar_object_unfixed.svg.png[/img][br][/td][td]Open the [img]https://www.geogebra.org/wiki/uploads/thumb/d/db/Stylingbar_icon_graphics.svg/16px-Stylingbar_icon_graphics.svg.png[/img] [i]Style Bar[/i] and fix all texts so they can't be moved accidentally.[/td][/tr][tr][td]16.[/td][td][img]https://wiki.geogebra.org/uploads/thumb/6/6c/Stylingbar_icon_algebra.svg/32px-Stylingbar_icon_algebra.svg.png[/img][br][/td][td]Close the [img]https://www.geogebra.org/wiki/uploads/thumb/4/40/Menu_view_algebra.svg/16px-Menu_view_algebra.svg.png[/img] [i]Algebra View[/i].[/td][/tr][/table]