# Introduction to conic sections | Conic sections | Algebra II | Khan Academy | Summary and Q&A

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June 15, 2009
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Introduction to conic sections | Conic sections | Algebra II | Khan Academy

## TL;DR

Conic sections refer to the intersection of a plane and a cone, resulting in shapes like circles, ellipses, parabolas, and hyperbolas.

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### Q: How are conic sections named?

Conic sections are named because they are formed by the intersection of a plane and a cone, resulting in shapes like circles, ellipses, parabolas, and hyperbolas.

### Q: What is the relationship between circles and ellipses?

Circles are a special case of ellipses, where they are perfectly symmetrical and not stretched more in one dimension than the other.

### Q: How can parabolas be represented by equations?

Parabolas can be represented by equations such as y = x^2 or x = y^2, and they can be shifted or rotated.

### Q: What are the characteristics of hyperbolas?

Hyperbolas have two curves that resemble open U-shapes and can be oriented in various directions. They approach asymptotes as they get closer to them.

## Summary & Key Takeaways

• Conic sections are shapes formed by the intersecting of a plane and a cone, and they include circles, ellipses, parabolas, and hyperbolas.

• Circles are equidistant points from a center, while ellipses are squished circles and can be tilted.

• Parabolas have a U-shape and can be represented by equations like y = x^2 or x = y^2.

• Hyperbolas have two curves that resemble open U-shapes and can be represented in various orientations.