Choose a real solid (cube, box, etc...) and create a model in [i]GeoGebra 3D Calculator[/i].

[br][size=100]Choose the measurement tools to measure the length of the solids edges, the surface area, or the volume of your model. [/size][table][tr][td]1.[/td][td][/td][td]Choose a real solid (like a cube, a tee box, etc...) and place it on your table. [/td][/tr][tr][td]2.[/td][td][/td][td]Open the [i]GeoGebra 3D Calculator[/i] on your mobile device.[/td][/tr][tr][td]3.[/td][td][/td][td]Click on the [i]AR[/i] button to switch to [i]AR [/i]mode and follow the instructions on your device to detect a surface. [/td][/tr][tr][td]4.[/td][td][icon]/images/ggb/toolbar/mode_move.png[/icon][/td][td]Go to the [i]Tools View [/i]and make sure that the [i]Move[/i] tool is selected. [/td][/tr][tr][td]5.[/td][td][/td][td]Have a look at the [i]AR Ratio[/i] in the lower-left corner, which displays the ratio between the [i]GeoGebra[/i] coordinate system and the real world.  If the ratio is set to 1:1, you will later get the real dimensions of your model. [/td][/tr][tr][td]6.[/td][td][icon]/images/ggb/toolbar/mode_polygon.png[/icon][/td][td]Go to the [i]Tools View[/i], select the [i]Polygon[/i] tool, and select each vertex of the base of the solid in a consecutive (clockwise or counterclockwise) order to create the base area. [/td][/tr][tr][td][br][/td][td][/td][td][b]Hint:[/b] In the end you have to select the first point again to close the polygon. The more precise you set the points on the real object, the more precise your model becomes.[br][/td][/tr][tr][td]7.[/td][td][icon]/images/ggb/toolbar/mode_extrusion.png[/icon][/td][td]Choose the [i]Extrude to Prism[/i] tool and drag the polygon to the correct height. [/td][/tr][tr][td]8.[/td][td][icon]/images/ggb/toolbar/mode_volume.png[/icon][/td][td]Choose the [i]Measure [/i]tools to measure the length of the edges, the surface or the volume of your model.[size=100][/size][/td][/tr][tr][td][/td][td][/td][td][/td][/tr][/table]

You can create many different objects and place them around you as you walk around them. By using the [i]AR Ratio[/i], you can see the ratio between distance in the GeoGebra coordinate system to distance in the real world around you. Explore your constructions from a new perspective and compare virtual with real objects!