Class 11 Maths Chapter 10 Conic Sections – Revision Notes

Quick revision notes for Class 11 Maths Chapter 10 (Conic Sections). These Class 11 Maths Chapter 10 notes are ideal for quick revision just before exams.

Types

• Circle: perpendicular plane cut.
• Ellipse: angled plane cut (not parallel to edge).
• Parabola: plane parallel to slant edge.
• Hyperbola: plane cuts both nappes.

Standard Equations

• Circle (centre h,k): (x−h)²+(y−k)²=r².
• Parabola: y²=4ax.
• Ellipse: x²/a²+y²/b²=1.
• Hyperbola: x²/a²−y²/b²=1.

Key Definitions

• Parabola: equidistant from focus & directrix.
• Ellipse: sum of distances to 2 foci = constant.
• Hyperbola: |difference| of distances to 2 foci = constant.

One-Line Summary

Conic sections (circle, parabola, ellipse, hyperbola) arise from slicing a cone at different angles, each with a standard equation and a defining distance property relating to focus/foci.

Written by Satish

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