Two Pins and a Piece of String

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An ellipse can be defined as the locus of points, the sum of whose distances to two fixed points (the foci) is constant. This is the elementary “two pins and a piece of string” construction.

Expressions

Name Input
Locus Eq Derive Input Maple Input MathML Input Mathematica Input Maxima Input Mupad Input TI-Nspire Input text Input Image
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