Copy of Feuerbach's Theorem

Author:Maggie Byrns, 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

Graphing Basic and Compound Inequalities
Midpoint Theorem Questions: Mild
Perpendicular Lines: Quick Exploration
Basic and Compound Inequality Illustrator
Rovnoběžnost rovin

Discover Resources

Refraction of light (simple light diagram)
Linear Graph
Area Perimeter Game - Easy
Hyperbolic Paraboloid
Derivatives

Discover Topics

Division
Arithmetic Operations
Trapezoid
Indefinite Integral
Cosine