Construction Of A Line Divided In Equal Parts

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An illustration showing the construction used to divide a line AB into two equal parts; and to erect a perpendicular through the middle. “With the end A and B as centers, draw the dotted circle arcs with a radius greater than half the line. Through the crossings of the arcs draw the perpendicular CD, which divides the line into two equal parts.”

Source

Albert A. Hopkins Scientific America: Handy Book Of Facts And Formulas (New York: Munn & Co., Inc., 1918) 35

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