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

Nine point circle and tangent circles

Author:
Rolandvdv

There are four circles (red) tangent to all three of the (extended) sides of a triangle. The nine-point circle (green) is tangent to all four of them.

New Resources

  • Substitution Fractal
  • G_10.04 Parallel and perpendicular lines_1a
  • نسبت پاره خط ها
  • Exploring Power Functions
  • Demo: 2 applets communicating

Discover Resources

  • area
  • Similarity Theorems!
  • McLean_7_intro
  • Color Function
  • Задача 290

Discover Topics

  • Means
  • Polynomial Functions
  • Rhombus
  • Volume
  • LCM and GCD

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