Changes
From Open Educational Resources
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, 08:11, 31 May 2019
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| − | {{Geogebra|GURbU5y2}}{{Geogebra|td5dbKMV}}[http://itforchange.net IT for Change] | + | {{Geogebra|GURbU5y2}}[http://itforchange.net IT for Change] |
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| | [[File:Angle sum property of a triangle.ggb]] | | [[File:Angle sum property of a triangle.ggb]] |