BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu...

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Basic Conic Sections Basic Conic Sections Justin Filbert Berwick High School 9 th Grade

Transcript of BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu...

Page 1: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

Basic Conic SectionsBasic Conic SectionsJustin FilbertBerwick High School 9th Grade

Page 2: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

Conics HistoryConics History• Discovered during the classical Greek period (600‐sco e ed du g e c ass ca ee pe od (600300 B.C.)

• The Greeks focused mainly on the geometric properties

• In the early 17th century, the applicability was ti d d l d t l i th d l tnoticed and played a strong role in the development 

of Calculus 

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Basic ConicsBasic Conics• A conic section is the                                                      co c sect o s eintersection of a    double‐napped cone d land a plane

• In forming the fourbasic conics the interbasic conics, the inter‐section of the plane and                                                 the cone does not pass                                              through the vertex

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Basic Conics (cont )Basic Conics (cont.)•

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CirclesCircles•

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The Standard Equation of a Circle•

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Finding the Standard Equation of a Circle 

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ParabolasParabolas•

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The Standard Equation of a Parabola•

Page 10: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

Finding the Standard Equation of a Parabola•

Page 11: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

Reflective Property of Parabolas• A line segment that passes through the focus of a g p gparabola and has endpoints on the parabola is called a focal chord

Th l t t i th ifi f l h d di l• The latus rectum is the specific focal chord perpendicular to the axis of the parabola

• A line is tangent is to a parabola at a point on the g p pparabola if the line intersects, but does not cross, the parabola at the point

Page 12: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

The EllipseThe Ellipse• An ellipse is defined as the set of all points (x,y) in a p p ( ,y)plane, the sum of whose distances from two distinct fixed points [foci (singular‐focus)] is constant

Th li th h th f i i t t th lli t t• The line through the foci intersect the ellipse at two points called vertices

• The major axis is the chord the joins the verticesj j

• The midpoint of the ellipse is called the center of the ellipse

Page 13: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

The Standard Equation of an Ellipse•

Page 14: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

Finding the Standard Equation of an Ellipse•

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Application of an EllipseApplication of an Ellipse• Ellipses have many practical and aesthetic uses, such as:

• Machine gears

• Supporting arches

• Acoustic designs• Acoustic designs

• The orbits of satellites and planets

• Etc.

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EccentricityEccentricity•

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Application of EccentricityApplication of Eccentricity•

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TheHyperbolaThe Hyperbola• A hyperbola can be defined as the set of all points (x y) in a place theof all points (x,y) in a place, thedifference of whose distance from two                                                         distinct fixed points, the foci, is a positive                                               constant

• A hyperbola is similar to a ellipse:• A hyperbola is similar to a ellipse:• An ellipse is the sum of the distances 

between the foci and a point on the ellipse  is constant

• Whereas a hyperbola is the difference• Whereas, a hyperbola is the differenceof the distances between the foci and two distinct fixed points is constant

• The two disconnected parts of the graph of ahyperbola are called the brancheshyperbola are called the branches

• The line through the two foci intersect the hyperbola at two points called the vertices

• The line connecting the vertices is the transverse axisTh id i t f th t i th t f th h b l• The midpoint of the transverse is the center of the hyperbola

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The Standard Equation of a Hyperbola•

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The Standard Equation of a Hyperbola•

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Asymptotes of a HyperbolaAsymptotes of a Hyperbola•

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Finding the Asymptotes and Standard Form of a Hyperbola

Page 23: BasicConicSectionsBasic Conic Sections...ConicsHistoryConics History • Discosco e edvered dudu gring the ccasscalassical Greek pepe odriod (600‐ 300 B.C.) • The Greeks focused

Finding the Asymptotes and Standard Form of a Hyperbola•

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General Equations of ConicsGeneral Equations of Conics•

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Further ResearchFurther Research•

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Thank You!Thank You!• I’d like to thank the judges and students for taking time to be here today

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ReferencesReferences