Feuerbach's Theorem

Author: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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Untitled
Building Trapezoids with Set Areas
Building Triangles with Set Areas
Building Figures with Set Areas
Classifying Triangles

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Integral_of_polynomial
Pappus Theorem (another instance)
Rectangle -Area
เรือ แอนนิเมชัน
Transformations appliquées à une fonction exponentielle

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Hyperbola
Exponential Functions
Geometric Mean
Volume
Root