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Izoptika

Izoptika je množica točk, za katere se po dve tangenti dane krivulje sekata pod danim kotom. Ortoptika je izoptika, ki ji pripada kot 90°.

Ortoptika parabole je njena direktrisa (direktrisa je premica za katero je značilno, da je razdalja od nje do fokusa konstantna).

Izoptike sinusoidnih spiral so sinusoidne spirale

Zgledi [1]

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Nekatere izoptične krivulje:

krivulja izoptika
cikloida trohoida
epicikloida epitrohoida
hipocikloida hipotrohoida
parabola hiperbola

Nekatere ortoptične krivulje:

krivulja ortoptika
astroida kvadrifolija
srčnica Pascalov polž
deltoida krožnica
elipsa krožnica
hiperbola krožnica
parabola direktrisa

Opombe in sklici

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Zunanje povezave

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Izoptika
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