Challenge Construction

Author:Elizabeth McCollum

It seems that when D is inside the circle, the locus of C and E is an ellipse. It seems that when D is outside the circle, the locus of C and E is a hyperbola. It also seems that A and D are the foci of the ellipse.

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montecarlo circles 1
函數的單調性
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גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
bewijs stelling van Pythagoras

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