Conic Sections – Circles

What is a conic section?

• An intersection between a plane and a double-napped cone.

• An intersection between a line and a double-napped cone.

• An intersection between a plane and a cylinder.

• An intersection between a plane and a sphere.

Which of the following conic sections is a circle?

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Which of the following conic sections is a parabola?

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Which of the following conic sections has an eccentricity of 0?

e = 0

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Which of the following conic sections has an eccentricity of less than 1?

e < 1

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It is a locus of points in a given distance from one point called the center.

• Parabola

• Circle

• Hyperbola

• Ellipse

It is the distance from the center to any point of a circle.

• Focus

• Directrix

• Radius

• Diameter

• ( h , k )

• ( k , h )

• ( h , r )

• ( r , k )

Which of the following is the general equation of a circle?

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