[size=200][b]Rotate the GeoGebra symbol 180º[/b][/size][br][br][color=#000000]An inversion around a point is just a rotation of 180º around the point.[/color][br][br][color=#9900ff]1st. Activate the "Point" tool [icon]/images/ggb/toolbar/mode_point.png[/icon] and click on one point to the Graphics View to draw the point "A".[/color][br][br][color=#9900ff]2nd. Activate the "Reflect Object in Point" tool [icon]/images/ggb/toolbar/mode_mirroratpoint.png[/icon].[/color][br][br][color=#9900ff]3rd. Click first the image and then the point "A".[/color][br][br][color=#000000]Activate the "Move" tool [icon]/images/ggb/toolbar/mode_move.png[/icon] and move the original point and image.[/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]