Ellisse Flashcards

1
Q

Equazione Ellisse con C=(0.0)

A

(x^2/a^2)+(y^2/b^2) = 1

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2
Q

Semiasse Orizzontale

A

a

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3
Q

Semiasse Verticale

A

b

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4
Q

Asse Orizzontale

A

2a

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5
Q

Asse Verticale

A

2b

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6
Q

Se a^2>b^2

A

2a Asse maggiore, 2b Asse minore

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7
Q

Se b^2>a^2

A

2b Asse maggiore, 2a Asse minore

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8
Q

Vertici con C=(0.0)

A

V1,2 = (±a,0) ; V3,4 = (0,±b)

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9
Q

Definizione Semidistanza Focale (c)

A

La semidistanza focale è definita come la semidistanza tra i due fuochi.

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10
Q

Equazione Semidistanza Focale (c)

A

c= sqrt(a^2-b^2) se a^2>b^2

c= sqrt(b^2-a^2) se b^2>a^2

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11
Q

Fuochi con C=(0.0)

A

F1,2 = (±c,0) se a^2>b^2

F1,2 = (0,±c) se b^2>a^2

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12
Q

Definizione Eccentricità dell’Ellisse

A

E’ una grandezza che misura la deformazione dell’ellisse (quanto l’Ellisse è schiacciata)

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13
Q

Equazione Eccentricità dell’Ellisse

A

e= c/a se a^2>b^2

e= c/b se b^2>a^2

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14
Q

Se e = 0

A

L’ellisse si riduce ad una circonferenza

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15
Q

Se e = 1

A

L’ellisse si riduce ad un segmento

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16
Q

Equazione Ellisse Traslata

A

((x-xc)^2/a^2)+((y-yc)^2)/b^2)=1

17
Q

Vertici Ellisse Traslata

A

V1= (xc-a, yc); V2= (xc+a,yc); V3= (xc,yc-b); V4= (xc, yc+b)

18
Q

Fuochi Ellisse Traslata

A

F1,2= (xc±c, yc) se a^2>b^2

F1,2= (xc, yc±c) se b^2>a^2