The ellipse as a locus.

作者：ltgrau

主題：橢圓

The ellipse is the locus of all points the sum of whose distances from two fixed points is a constant. We visualize this definition and check the sum of distances when a point runs the ellipse.

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Exploring Exponentials
Midsegment
Problems from Text: Dot Product and Projection
Inverse in circumcircle of X(1) = I Methode 1
Writing Equations of Lines

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極限值
一般四邊形
直方圖
Pythagoras or Pythagorean Theorem
線性規劃或線性最佳化

The ellipse as a locus.

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