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

© 2023 GeoGebra

Two circles are tangent to each other and tangent from the inside to a third circle

Author:
Idan Tal
Topic:
Circle

The applet illustrates variance by changing R1 (or R2) leading to invariant property of the perimeter P of ∆oo1o2: P∆oo1o2 = 2R.

New Resources

  • Radian Placement Practice
  • Building Similar Triangles
  • Linear Function to Bowl or Cup
  • Exploring Dilations
  • Graphing Sinusoidial Functions (All Transformations)

Discover Resources

  • Phasor diagram of synchronous machine and sinusoids
  • Investigating the Roots of Complex Numbers
  • solar system2
  • Exponentials
  • position vs Time

Discover Topics

  • Subtraction
  • Special Points
  • Volume
  • Surface
  • Line Segment

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