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[Label1]
Caption=Знайти множину точок на площині, різниця ~~відстаней яких до двох фіксованих точок ~~D та E (фокусів) є величина постійна.
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Caption=Різниця відстаней:~~DG-EG=2c; DF-EF=2c;~~EH-DH=2c; EI-DI=2c.~~Відстань між фіксованими~~точками DE=2a.
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Caption=DG=[DG]; EG=[EG];   DF=[DF]; EF=[EF];~~EH=[EH]; DH=[DH];    EI=[EI]; DI=[DI].~~~~DG-EG= [DG-EG];    DF-EF=[DF-EF];~~EH-DH= [EH-DH];     EI-DI=[EI-DI].~~~~DE=[DE];           AC=[AC].
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Caption=     На площині дано дві фіксовані точки D та E. На прямій АС задано рухому точку В. Відстань між точками А та С - фіксована. ~~Точки F,G,I та H на площині такі що: AB=DG=DF=EH=EI; BC=EG=EF=DH=DI, тобто DG-EG=DF-EF=EH-DH=EI-DI=AC=2c.~~     Рухаючі точку В по прямій АС, спостерігайте, яку криву описують точки F,G,H, та I. Послідовно змінюйте відстані між точками ~~А та С, потім між точками D та E. Як при цьому змінюється крива, яку описують рухомі точки на площині?
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Desc=Надпис "Перетягніть точку С щоб намалювати криву."
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