Construction of a Conic

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Diagram showing how to construct a conic when given the focus and the auxiliary circle. If the focus is outside the circle, we get a hyperbola. If it’s inside the circle, we get an ellipse. If the auxiliary circle is a straight line (radius is infinite), we get a parabola.

Keywords

cone, ellipse, ellipses, circle, conic section, hyperbola, construction, circles, focus, conics, foci, construct, hyperbolas

Galleries

Geometric Constructions

Source

Arthur Latham Baker The Elements of Solid Geometr with Numerous Exercises (Boston, MA: Ginn & Company, 1893)

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