Construction Of A Heptagon
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An illustration showing how to construct a heptagon, or septagon. “The appotem a in a hexagon is the length of the side of the heptagon. Set off AB equal to the radius of the circle; draw a from the center C at right angles to AB; then a is the required side of the heptagon.”
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Geometric ConstructionsSource
Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 37
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