Copy of Feuerbach's Theorem

Autor:cornel welster, 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.

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Measuring Cup
bewijs stelling van Pythagoras
Slopes of Straight Lines
Isosceles Triangle Cross Sections

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Simplifying Radicals (II)
PreCal Proj.
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Dad's Shelf
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