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

Aristarchos' half moon

Author:A. G. Gomez (agg29@ou.ac.uk)
Illustration of Gomez's VA theory on the origin of Aristarchos' 87° angle.

New Resources

  • Fourier Lissajous (Mechanical)
  • Model sferyczny - sześcian-ośmiościan
  • Conway Circle Theorem
  • Model sferyczny - dwunastościan-dwudziestościan
  • Pathway to Proof: Triangle Angles

Discover Resources

  • Bezier construction
  • Symmetry of quadrilaterals
  • The Arc of Triumph
  • Triangle- Arsh Muhib
  • Find the Greatest number

Discover Topics

  • General Quadrilateral
  • Continuity
  • Quadratic Equations
  • Calculus
  • Tangent Function
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

© 2026 GeoGebra®