https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/alg2-graphs-of-circles-intro/v/introduction-to-conic-sections 2021-05-26T15:51:55Z Intro to conic sections Sal introduces the four conic sections and shows how they are derived by intersecting planes with cones in certain ways. Sal Khan video https://cdn.kastatic.org/googleusercontent/RPWgYvDzMuiAzmQiOD9YRcWvZHF0dwBjlAHDhulF1J_WJKAg_F2Y44b_iZC_03pWPmyEhYAqttYl3kM1qUcvhoLh Intro to conic sections Sal introduces the four conic sections and shows how they are derived by intersecting planes with cones in certain ways. https://cdn.kastatic.org/ka-youtube-converted/0A7RR0oy2ho.mp4/0A7RR0oy2ho.mp4 658 Sections of a cone https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:conic-sections-ncert-new/x0419e5b3b578592a:sections-of-a-cone/v/sections-of-a-cone 2025-06-01T03:41:19.129224051Z Sections of a cone In this video, we explore how the famous conic sections are formed. We'll start with a double-napped right circular cone and see how slicing it with a plane at different angles can create a circle, an ellipse, a parabola, or a hyperbola. We will also look at the special cases, known as degenerate conics, that are formed when the plane passes through the vertex of the cone. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Sections of a cone In this video, we explore how the famous conic sections are formed. We'll start with a double-napped right circular cone and see how slicing it with a plane at different angles can create a circle, an ellipse, a parabola, or a hyperbola. We will also look at the special cases, known as degenerate conics, that are formed when the plane passes through the vertex of the cone. https://cdn.kastatic.org/ka-youtube-converted/57oZ_tXl8c0.mp4/57oZ_tXl8c0.mp4 405 Sections of a cone https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:conic-sections-ncert-new/x0419e5b3b578592a:sections-of-a-cone/v/definitions-of-conic-sections 2025-06-01T03:41:19.129224051Z Definitions of conic sections This video covers the fundamental definitions of the conic sections, each described as a locus of a moving point. We'll explain the specific geometric condition that defines a circle, a parabola (involving its focus and directrix), an ellipse (involving its two foci), and a hyperbola (also involving its two foci). We will also briefly introduce the concept of eccentricity. Ashish Gupta video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Definitions of conic sections This video covers the fundamental definitions of the conic sections, each described as a locus of a moving point. We'll explain the specific geometric condition that defines a circle, a parabola (involving its focus and directrix), an ellipse (involving its two foci), and a hyperbola (also involving its two foci). We will also briefly introduce the concept of eccentricity. https://cdn.kastatic.org/ka-youtube-converted/LHxZ78zAGcc.mp4/LHxZ78zAGcc.mp4 486 Sections of a cone https://www.khanacademy.org/math/ka-math-class-11/x0419e5b3b578592a:conic-sections-ncert-new/x0419e5b3b578592a:sections-of-a-cone/e/definitions-of-conic-sections 2025-08-08T02:53:40.009522544Z Definitions of conic sections Definitions of conic sections Ashish Gupta exercise https://www.khanacademy.org/math/geometry/xff63fac4:hs-geo-conic-sections/xff63fac4:hs-geo-parabola/a/conic-section-faq 2023-01-05T00:12:58.57009259Z Conic sections FAQ Frequently asked questions about conic sections article