Circonferenza Flashcards

Equazioni circonferenza

1
Q

Equazione Circonferenza

A

(x-xc)^2+(y-yc)^2=r^2 C=(xc,yc)

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2
Q

Equazione Circonferenza con C=(0,0)

A

x^2+y^2=r^2

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3
Q

Equazione Canonica della Circonferenza

A

x^2+y^2+αx+βy+β=0

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4
Q

Relazione ɣ

A

ɣ=xc^2+yc^2-r^2

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5
Q

Relazione α

A

α=-2xc

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6
Q

Relazione β

A

β=-2yc

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7
Q

Relazione C

A

C= ( -α/2 , -β/2 )

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8
Q

Relazione r

A

r= sqrt((α^2)/4+(β^2)/4-ɣ)

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9
Q

Raggio con P e C

A

r= sqrt((xp-xc)^2+(yp-yc)^2)

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10
Q

Definizione Asse Centrale

A

Date due Circonferenze, a prescindere dalla loro posizione, si definisce “asse centrale” la retta passante per i loro centri

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11
Q

Definizione Asse Radicale

A

Date due Circonferenze secanti, si definisce “asse radicale” la retta passante per i due punti d’intersezione delle due circonferenze

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12
Q

Equazione Asse Radicale

A

(α-α’)x+(β-β’)y+ɣ-ɣ’=0

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