# Screencasts

- How to get to launch or download GeoGebra.

http://www.screenr.com/qocH - How to insert a photo into GeoGebra, make it transparent and set it as a background image.

http://screenr.com/2gP8 - Inserting a photo in GeoGebra and placing specifically it using co-ordinates for the corners.

http://screenr.com/KgP8 - How to insert text onto the graphics view in GeoGebra.

http://screenr.com/GgP8 - How to save a GeoGebra file.

http://screenr.com/tgP8 - Triangles and angels highlighted in a photo using GeoGebra.

http://screenr.com/dMP8 - Using the undo/redo buttons and measuring an angle in a photo using GeoGebra.

http://screenr.com/cMP8

- Using circle tools in GeoGebra to investigate a photo of a jelly fish.

http://screenr.com/YMP8 - Using reflection tools in GeoGebra to investigate symmetry in a photo.

http://screenr.com/5MP8 - Using GeoGebra to find the parabola/quadratic function in an arc of water – part one setting up the image.

http://screenr.com/pWP8 - Using GeoGebra to find the parabola/quadratic function in an arc of water – part two investigating the image.

http://screenr.com/tWP8 - Using GeoGebra and the completed square form of quadratic function to investigate an arc of water image.

http://screenr.com/QWP8 - Fitting parabola/quadratic function to an arc of water using the spreadsheet tools in GeoGebra.

http://screenr.com/HCP8