Construction Of A Perpendicular
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An illustration showing the construction used to erect a perpendicular from a point to a line. “With C as a center, draw the dotted circle arc so that it cuts the line at A and B. With A and B as centers, draw the dotted cross arcs at D with equal radii. Draw the required perpendicular through C and crossing D.”
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Geometric ConstructionsSource
Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 35
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