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GeoGebra is an internationally acclaimed dynamic maths program for education. It is free and multi-platform marrying geometry with algebra(hence its name).
project pages [ 1 ][ 2 ]
GeoGebra on the Net : a show-case of math projects from across the world:
|matrix addition of vectors||Linda Fahlberg-Stojanovska||U.S.A.|
|circles, subtended angles from arcs,chords||Guy Barmoha||U.S.A|
|angles between two intersecting lines||Alginon||U.K.|
|external angle of a triangle equals sum of int. opps. angles||Alginon||U.K.|
|parallelogram properties||David Freeston||Australia|
Experiment with the controls to make your own project. You can save any work to your computer.
GeoGebra software is available FREE to download to you computer here to use whenever you wish.