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

Angle in a Semi-circle 3

Author:GreenMaths
Topic:Circle, Geometry
A visual proof of why the angle in a semi-circle is 90.

New Resources

  • Shells
  • Reflection across a line
  • seo tool
  • רישום חופשי
  • Exploring GeoGebra for the First Time

Discover Resources

  • Angles!
  • Transversal Exploration
  • Euklidiese_meetkunde_Vierhoeke_Vierkant
  • Reuleaux Triangle
  • AF8-01-Q5 Identify component functions from the graph of a sum or difference of two functions.

Discover Topics

  • Intersection
  • Mathematics
  • Arithmetic Operations
  • Centroid or Barycenter
  • Special Points
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®