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

Lee Sallow's Triplets

Author:
Chip Rollinson
Lee Sallow's new theorem about the pairs of triangles formed by the medians of a triangle. Featured in the December 2014 issue of Mathematics Magazine. Cool stuff! Move points A, B, and C around to adjust the original triangle.

New Resources

  • Truncated Icosidodecahedron
  • Multipurpose Number (0-20) Generators
  • Open Middle: Horizontal and Vertical Distances (V2)
  • Snub Dodecahedron
  • Multipurpose 20 Frame Randomizer

Discover Resources

  • Dice Roll Simulation
  • Forum_35862_A1_Beschriftung am Strich
  • Test Exercise
  • incenter
  • Pop that Balloon 3

Discover Topics

  • Similarity Transformation or Similarity
  • Scatter Plot
  • Orthocenter
  • Upper and Lower Sum or Riemann Sum
  • Conic Sections

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