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octagon
Compass Constructions: Octagon (Simplifying Math)
Compass Constructions: Square, Octagon, 16-gon (Simplifying Math)
To construct a OCTAGON with ruler (straightedge) and compass
Learn about Shapes with Shawn's Roller Coaster Adventure! (Learn 15 2D and 3D shapes)
Sport psychology - inside the mind of champion athletes: Martin Hagger at TEDxPerth
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