Search
Google 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

  • apec
  • Graphing a Circle in Polar Coordinates
  • Simple example: Colored circle
  • Graphing 1 + cos(theta) in Polar Coordinates
  • အခြေခံ data အခေါ်အဝေါ်များ

Discover Resources

  • Notes 11-13-15
  • Unit 10 Sketch revision
  • Test
  • Zadatak11
  • Multiplication_construction

Discover Topics

  • Geometric Distribution
  • Real Numbers
  • Median Line
  • Distributions
  • Incircle or Inscribed Circle
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

© 2025 GeoGebra®