Conic Section Showing Ellipse Small 201×320 Medium 403×640 Large 645×1024 Download Tiff Original 1511×2400 | (425.0 KB) Description Illustration showing the definition of an ellipse as a conic section. The plane cuts the cone obliquely. Keywords cone, cones, conic section, ellipse, ellipses Galleries Conic Sections: Ellipses Source: Ervin Kenison, S. B. and Edward B. Waite, S. B. Mechanical Drawing (Chicago: American School Of Correspondence, 1917) Part III: Page 103
