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

Midpoint Theorem (V2): Integer Solutions
繪畫垂直線
Congruent Sides & Angles in △s: Exploration
Isosceles Right Triangle
Congruent Figures

Discover Resources

Untitled
Absolute Extrema Explorer
H Polynomials
Fourier series
Cyclic Quadrilateral

Discover Topics

Vectors 3D (Three-Dimensional)
Similarity Transformation or Similarity
Step Functions
Trigonometric Functions
Bar Chart or Bar Graph