Feuerbach's Theorem

作成者:V8frr

Feuerbach's theorem, which states that the nine-point circle is tangent to the three excircles of the triangle as well as its incircle. Drag A, B and C to see that this reamins invariable for any triangle.

新しい教材

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Pattern
Segment Length of Chord and tangent in Circle
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parallel line

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