Create points that are restricted to one of these objects each.
[table][tr id=selectPointOnObject][td]1.[/td][td][icon]/images/ggb/toolbar/mode_pointonobject.png[/icon][/td][td]Select the [i]Point on Object[/i] tool. [/td][/tr][tr id=step1][td]2.[/td][td][icon]https://beta.geogebra.org/images/ggb/toolbar/mode_pointonobject.png[/icon][/td][td]Select the triangle in order to create a point [i]A[/i] on the triangle.[br][/td][/tr][tr id=movePointTriangle][td]3.[/td][td][icon]/images/ggb/toolbar/mode_move.png[/icon][/td][td]Move point [i]A[/i] in order to check whether it is restricted to the triangle's area.[/td][/tr][/table]
[table][tr id=step2][td]4.[/td][td][icon]https://beta.geogebra.org/images/ggb/toolbar/mode_pointonobject.png[/icon][/td][td]Create a point [i]B[/i] that can only move along the circle's cirumference.[/td][/tr][tr id=movePointCircle][td]5.[/td][td][icon]https://beta.geogebra.org/images/ggb/toolbar/mode_move.png[/icon][/td][td]Move point [i]B[/i] in order to check whether it is restricted to the circle's circumference.[/td][/tr][tr id=step3][td]5.[/td][td][icon]https://beta.geogebra.org/images/ggb/toolbar/mode_pointonobject.png[/icon][/td][td] Create a point [i]C[/i] that can only move along the function.[/td][/tr][tr id=movePointFunction][td]7.[/td][td][icon]https://beta.geogebra.org/images/ggb/toolbar/mode_move.png[/icon][/td][td]Move point [i]C[/i] in order to check whether it is restricted to the function.[/td][/tr][/table]