[size=200][b]Rotate the GeoGebra symbol[/b][/size][br][br][color=#000000]To rotate an object you must define the point from which the rotation is made and the angle, which you will define with a slider.[/color][br][br][color=#9900ff]1st. Activate the "Slider" tool [icon]/images/ggb/toolbar/mode_slider.png[/icon] and click on a point the Graphics View to open the dialog window.[/color][br][br][color=#9900ff]2nd. Click on the "Angle" option and the name will be converted into alpha "α".[/color][br][br][color=#9900ff]3rd. Into the "[color=#000000][b]Increment[/b][/color]" option of the "[color=#000000][b]Interval[/b][/color]" tab, type [color=#000000][b]1º[/b][/color].[/color][br][br][color=#9900ff]4th. Click on the "[color=#000000][b]OK[/b][/color]" button.[/color][br][br][color=#9900ff]5th. Activate the "Point" tool [icon]/images/ggb/toolbar/mode_point.png[/icon].[/color][br][br][color=#9900ff]6th. Click on one point to the Graphics View outside the symbol to draw the point "A" that will be the centre of rotation.[/color][br][br][color=#9900ff]7th. Activate the "Rotate around Point" tool [icon]/images/ggb/toolbar/mode_rotatebyangle.png[/icon].[/color][br][br][color=#9900ff]8th. Click on the GeoGebra symbol first, then on the point "A". Introduce the rotation angle into the field of the appearing dialog window. Erase the angle and click on the alpha symbol that will open the virtual keyboard to select the alpha angle (the first one).[/color][br][br][color=#9900ff]9th. Click on the "[color=#000000][b]OK[/b][/color]" button.[/color][br][br][color=#000000]Activate the "Move" tool [icon]/images/ggb/toolbar/mode_move.png[/icon] and move the slider.[/color][br][br][color=#000000]The two curved arrows located in the upper right corner of the Graphics View allow you to reset the activity.[/color][br][color=#000000]If the activity is correct, you will get 10 points automatically.[/color]