Construction Of An Octagon From a Square

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An illustration showing how to construct a regular octagon from a square by cutting off the corners of the square. “With the corners as centers, draw circle arcs through the center of the square to the side, which determine the cut-off.”

Source

Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 37

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