Unwrapping a Cylinder: REVAMPED!
- Tim Brzezinski
A HUGE THANK YOU and CREDIT ACKNOWLEDGEMENT to both Bernat and Steve Phelps, who calculated the surface equations for the curved parts of the cylinder's lateral area (during the unwrapping process). This enhanced version (of this original version) would not have been possible without their insight. To explore this resource in GeoGebra Augmented Reality, see the directions below this applet.
To Explore in GeoGebra Augmented Reality:
1) To explore in GeoGebra Augmented Reality, you need a device that has ARCore by Google already installed on it. Here's the link to install it (if you have not yet done so). 2) Also be sure GeoGebra 3D Graphing Calculator is installed on your device. If you have not yet installed it, you can download it here. 3) Open up GeoGebra 3D Graphing Calculator on your device. 4) Go to the MENU (horizontal bars) in the upper left corner. Select OPEN. In the Search GeoGebra Resources input box, type rCxXxFhE (Note this is the resource ID = last 8 digits of the URL for this resource.) 5) In the resource that uploads to the GeoGebra 3D Graphing Calculator, zoom in/out if needed. Press the AR button in the lower right corner of your 3D screen. Follow the directions that appear. For more info with respect to opening GeoGebra Augmented Reality, click here. Note: The r slider adjusts the radius of the cylinder. The h slider adjusts the height of the cylinder. Drag the slider named i to wrap/unwrap.