# Construction Of An Ellipse

## Description

An illustration showing how to construct an ellipse. "With a as a center, draw two concentric circles with diameters equal to the long and short axes of the desired ellipse. Draw from o any number of radii, A, B, etc. Draw a line Bb' parallel to n and bb' parallel to m, then b is a point in the desired ellipse.

## Keywords

analytic geometry, analytical, conic section, conic sections, construct, ellipse, ellipses, geometric construction, geometry

## Galleries

## Source:

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

Courtesy the private collection of Roy Winkelman