Editing ConstructingAnOctagon
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Medieval stonemasons used this method to construct octagons in a given square window. Open your compasses to a radius of half the diagonal of the square and construct an arc with centre one vertex of the square - mark the two points where the arc crosses the sides. IMG:octagon1.png Do that for all 4 vertices of the square giving 8 points which are the vertices of an octagon. IMG:octagon2.png Is the octagon regular? Can you prove it? ---- Enrichment Task