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Incircle, Excircles, and the 9-Point Circle
Author:
Steve Phelps
Topic:
Circle
,
Circumcircle or Circumscribed Circle
,
Incircle or Inscribed Circle
,
Triangles
There are four circles tangent to three sides of a triangle...
GeoGebra
And one circle tangent to all four circles.
GeoGebra
New Resources
Explore the invariant lines of matrix {{-2,5},{6,-9}}
Shadow of a Cube (v2)
Exploring the Derivative of a Quadratic Function
Quiz: Finding Average Rate of Change
Average Rate of Change: Graph a Function (2)
Discover Resources
Kohrt
Structure - 1DPoint - Linear - Vary Evrythng Excpt Sldr
Coordinate Rules - Rotation
Função Quadrática
Sfere in 3D
Discover Topics
Arithmetic Operations
Fractal Geometry
Mathematics
Equilateral Triangles
Trapezoid