1) Open up GeoGebra 3D app on your device. [br][br]2) Go to the MENU (horizontal bars) in the upper left corner. Select OPEN. [br] In the Search GeoGebra Resources input box, type [b]eddfae6f[/b][br] [br]3) In the resource that uploads, zoom in/out if needed.[br] Use the [b]r[/b] slider to control the radius of the cone[br] Use the [b]h[/b] slider to control the height of the cone.[br]