# Construction Of An Ellipse

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An illustration showing how to construct an ellipse. Given the two axes, set off half the long axis from c to ff, which will be the two focuses in the ellipse. Divide the long axis into any number of parts, say a to be a division point. Take Aa as radius and f as center and describe a circle arc about b, take aB as radius and f as center describe another circle arc about b, then the intersection b is a point in the ellipse, and so the whole ellipse can be constructed.”

### Keywords

geometry, ellipse, ellipses, conic sections, conic section, geometric construction, analytic geometry, analytical, construct, ellipse using circle arcs, circle arc### Galleries

Conic Sections: Ellipses### Source

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

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