Conic Sections Class 11 Notes

Conic Sections Class 11 Notes – Chapter 11

Let us consider a fixed vertical line (l) and let (m) be another line intersecting line (l) at any fixed point V. Let α be the angle of intersection between line l and m. If line m is rotated around line l such that the angle of intersection (α) remains constant. Then, the resultant surface is a double-napped circular hollow cone. Where V is known as the vertex, l is the axis and m is known as the generator of the resultant cone.

The vertex separating the cone into 2 different parts is known as the nappes. The section obtained by the intersection of a cone with the plane is known a the conic section. Based on the angle and position of the intersecting plane w.r.t. cone, different types of conic sections can be obtained. Please refer Conic Sections Class 11 Notes for more revision notes.