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[color=#c51414][b]Chapter 9.2 Rotational Symmetry:[/b][/color]
Rotational Symmetry of Cube
[url]http://youtu.be/gBg4-lJ19Gg[/url]
Rotational Symmetry of Tetrahedron
[url]http://youtu.be/qAR8BFMS3Bc[/url]
[color=#c51414][b]Chapter 9.3 Font, side and top views:[/b][/color]
Cube House
[url]http://www.fisme.science.uu.nl/toepassingen/03377/[/url]
Rotating houses
[url]http://www.fisme.science.uu.nl/toepassingen/03378/[/url]
Building with blocks
[url]http://www.fisme.science.uu.nl/toepassingen/00724/[/url]