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

Cut-The-Knot-Action 11!

Author:Tim Brzezinski
Topic:Equilateral Triangles
Creation of this applet was inspired by a tweet from Alexander Bogomolny. How can you formally prove what this applet informally illustrates?

Quick (Silent) Demo

New Resources

  • အခြေခံ data အခေါ်အဝေါ်များ
  • גיליון אלקטרוני להעלאת נתוני בעיה ויצירת גרף בהתאם
  • Translation of the Graph of a Function
  • Graphing 1 + cos(θ) in Polar Coordinates
  • Limaçons

Discover Resources

  • composition
  • IM2.7 T8 Angles formed by Secants (outside)
  • Quadrangular pyramid: all section
  • Tangent Curve
  • Adding subtracting negative n…
  • H - Right triangle

Discover Topics

  • Differential Equation
  • Isosceles Triangles
  • Secant Line or Secant
  • Diagrams
  • Statistical Characteristics
AboutPartnersHelp Centre
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®