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Allan Danuff
Building 7, Room 102D
(352) 854-2322, Ext. 1262
Conic Sections
Parabola:
Vertex: ( h, k )
Direction: p>0 up, p<0 down
Focus: ( h, k + p )
Directrix: y = k – p
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Vertex: ( h, k )
Direction: p>0 right, p<0 left
Focus: ( h + p, k )
Directrix: x = h - p
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Circle:
Center: ( h, k )
Radius: r
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Ellipse:
| If a > b:
Center: ( h, k )
Major Vertices:
( h + a, k), ( h – a, k)
Minor Vertices:
( h, k + b), ( h, k – b)
Foci:
( h + c, k ), ( h – c, k )
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If a < b: Center: ( h, k )
Major Vertices:
( h, k + b), ( h, k – b)
Minor Vertices:
( h + a, k), ( h - a, k)
Foci:
( h, k + c ), ( h, k – c )
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Hyperbola:
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Vertices:
( h + a, k ), ( h - a, k )
Asymptotes:
Foci :
( h + c, k ), ( h – c, k )
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Vertices:
( h , k + b ), ( h , k - b )
Asymptotes:
Foci :
( h, k + c ), ( h, k - c )
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