GeoGebra
  • Create Lesson
GeoGebra
  • Home
  • News Feed
  • Resources
  • Profile
  • People
  • Classroom
  • App Downloads
About GeoGebra
Contact us: office@geogebra.org
Terms of Service – Privacy – License

© 2022 GeoGebra

Incircle, Excircles, Gergonne and Nagel

Author:
Steve Phelps
Topic:
Circle, Circumcircle or Circumscribed Circle, Incircle or Inscribed Circle, Triangles

The segments drawn from the point of tangency of a side and incircle to the opposite vertex is the Gergonne point.

The segments drawn from the point of tangency of a side and excircle to the opposite vertex is the Nagel point.

New Resources

  • Regular Pentagon Wonder: GoGeometry Action 192!
  • A1_4.04 Two variable linear inequalities 278287
  • GCD of Three Numbers (Practice Exercise)
  • Geodätische Kuppel
  • A1_4.04 Two variable linear inequalities 278287_a

Discover Resources

  • Straight line
  • Brittany1
  • ostrom
  • kubus 1
  • Inverses and Orthogonal Circle

Discover Topics

  • General Quadrilateral
  • Arithmetic Operations
  • Poisson Distribution
  • Symmetry
  • Statistical Characteristics

GeoGebra

  • About
  • Partners
  • GeoGebra on Tests
  • News Feed
  • App Downloads

Apps

  • Calculator Suite
  • Graphing Calculator
  • 3D Calculator
  • CAS Calculator
  • Scientific Calculator

Resources

  • Classroom Resources
  • Learn GeoGebra
  • Classroom
  • Geometry
  • Notes
  • Terms of Service Privacy License
  • Facebook Twitter YouTube