Search
Google ClassroomGoogle Classroom
GeoGebraGeoGebra Classroom

Outline

  1. For Debating "Flat Earthers"
    1. Simulate Low-Altitude Photo of Horizon of Sphere
    2. Curvature of Earth's Sea-Level Horizon, to Scale
    3. See how horizon varies with viewer's altitude
    4. Formula for "Obstructed Height" on a Sphere

For Debating "Flat Earthers"

Author:JimSmithInChiapas
Topic:Trigonometry
The growth of the "Flat Earth" movement is a troubling development. The resources in this book will help you to refute their claims that involve (or ignore!) geometry.

  • Simulate Low-Altitude Photo of Horizon of Sphere

  • Curvature of Earth's Sea-Level Horizon, to Scale

  • See how horizon varies with viewer's altitude

  • Formula for "Obstructed Height" on a Sphere

Next
Simulate Low-Altitude Photo of Horizon of Sphere

New Resources

  • Conway Circle Theorem
  • Nikmati Keunggulan Di Bandar Judi Terpercaya
  • Damped Trochoidal Curve
  • Publish app "Public" test
  • Rolling Circles and Polygons

Discover Resources

  • SetValue
  • KETAKSAMAAN SEGITIGA
  • Hexagonal Prism
  • Parallel method
  • Test 1
  • Reflection ICME example 1

Discover Topics

  • Scalene Triangles
  • Rectangle
  • Arithmetic Mean
  • Square
  • Hypothesis Testing
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®