# Construction Of An Ellipse Tangent To Two Parallel Lines

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An illustration showing how to construct an ellipse parallel to two parallel lines A and B. “Draw a semicircle on AB, draw ordinates in the circle at right angle to AB, the corresponding and equal ordinates for the ellipse to be drawn parallel to the lines, and thus the elliptic curve is obtained as shown by the figure.”

### Keywords

geometry, ellipse, ellipses, conic sections, conic section, geometric construction, analytic geometry, analytical, construct, ellipse tangent to two parallel lines### Galleries

Geometric Constructions### Source

Albert A. Hopkins *Scientific America: Handy Book Of Facts And Formulas* (New York: Munn & Co., Inc., 1918) 39

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