Section of a circular cone by a plane (hence the name).

Algebraic curve with degree 2 (equation ax² + bxy + cy² + dx + ey + f = 0).

Locus of points and envelopes.

Circles and directrix lines.

Parameter. Excentricity.

Conic sections as locus of points.

Tangents to conic sections. Conic sections as envelopes of lines.

Constructions

Construct a conic section, given etc...

Constructions

Homography and Co

Pascal theorem ...

Pencils of conic sections and applications.

Constructions (intersections).

Constructions (conic section defined by ...).