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.

New Resources

Right Triangle Inscribed in a Semicircle
Linear Combination of Vectors
Midpoint Theorem (V2): Integer Solutions
Graphing Basic and Compound Inequalities
Laundry Basket

Discover Resources

Supplementary Angles
Loc Geometric: Mediana.
Two Number Lines #4
Венов дијаграм и подскупови
Max/Min inside x^2+y^2<=1 of f(x,y)=ln((x^2+4)/(y^2+1))

Discover Topics

Linear Equations
Correlation
Straight Lines
Terms
Vectors