Copy of Feuerbach's Theorem

Author: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.

New Resources

Building Trapezoids with Set Areas
Rolling Circles and Polygons
Superellipse
apec
Building Figures with Set Areas

Discover Resources

mandale
Testing
six trig functions on unit circle
paper pinwheel
networkslicing

Discover Topics

Addition
Median Value
Trapezoid
Standard Deviation
Random Variables