Search
Google Classroom
GeoGebraGeoGebra Classroom
GeoGebra
  • Home
  • Resources
  • Profile
  • Classroom
  • App Downloads

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

  • Fractals: The Pythagoras tree
  • အခြေခံ data အခေါ်အဝေါ်များ
  • רישום חופשי
  • גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
  • Advanced example 3: Colored vector field 3D

Discover Resources

  • Rectangle Shape Project
  • First Polygon
  • Modul 10_A Muhammad Arfiyadi Ahsan_SDN Belitung Utara 1
  • Standard 5% Resistor Values Slider
  • Vector Projection

Discover Topics

  • Rational Numbers
  • Variance
  • Statistics
  • Cube
  • Interest Calculation
AboutPartnersHelp Center
Terms of ServicePrivacyLicense
Graphing CalculatorCalculator SuiteMath Resources

Download our apps here:

Download_on_the_App_Store_Badge_US-UK_RGB_blk_4SVG_092917

© 2025 GeoGebra®