Create a parallelogram on a virtual [i]Geoboard[/i] and include automatic feedback by following the construction steps below.

[b]Note:[/b] If you're using the Mobile App make sure that the chosen [i]Labeling[/i] option is [i]New Points Only[/i]. You can change this by going to the [i]Settings [/i]in the app's menu and then selecting [i]General.[/i][br][br][table][tr][td]1.[/td][td][/td][td]Switch to the [i]Algebra View [/i]to create the [i]Geoboard[/i].[/td][/tr][tr][td]2.[/td][td][/td][td]Type [math]pegs=Sequence\left(Sequence\left(\left(a,b\right),a,1,10\right),b,1,10\right)[/math] into the [i]Input Bar[/i].[br][/td][/tr][tr][td]3.[/td][td][br][/td][td]Change the style of the points of the sequence to empty gray dots.[br][b]Note:[/b] All points of the sequence will change together.[/td][/tr][tr][td]4.[/td][td][/td][td]Switch back to the [i]Tools View[/i].[/td][/tr][tr][td]5.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_point.png[/icon][/td][td]Create points [i]A[/i], [i]B[/i], [i]C[/i] and [i]D [/i]on the [i]Geoboard.[/i][/td][/tr][tr][td]6.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_segment.png[/icon][/td][td]Select the [i]Segment[/i] tool to create a quadrilateral by connecting the points [i]A[/i], [i]B[/i], [i]C[/i] and [i]D[/i].[/td][/tr][tr][td]7.[/td][td][/td][td]Change the style of the points and segments.[/td][/tr][/table]

[table][tr][td]8.[/td][td][/td][td]Switch to the [i]Algebra View [/i]to create a text for automatic feedback.[br]Type[math]If[/math]([math]f\parallel h\wedge g\parallel i[/math][i], "Parallelogram", "No Parallelogram"[/i]) into the [i]Input Bar[/i] to check if the opposite segments are parallel. If they are parallel the shown text will be [i]Parallelogram[/i].[/td][/tr][tr][td]9.[/td][td][/td][td]Switch back to the [i]Tools View[/i].[/td][/tr][tr][td]10.[/td][td][icon]https://www.geogebra.org/images/ggb/toolbar/mode_move.png[/icon][/td][td]Move the corners to explore your construction. [/td][/tr][/table]