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

Catriona Shearer: Triangle and Semicircle

Author:John Golden
Topic:Angles, Area
Another delightful puzzle, with a surprising (to me) relation. From: Catriona Shearer on Twitter 

New Resources

  • Squaring a Rectangle (PST Version)
  • Right Triangle Inscribed in a Semicircle
  • Pythagorean Template: Integer Legs
  • Pythagorean Theorem: Quick Illustrator
  • Linear Equation Graphs: Thin Slice

Discover Resources

  • Nature of a Curve
  • Equidistant
  • Tony Foster's Proof of Viviani's Theorem
  • Puzzle Piece
  • Reflecting a point about a line

Discover Topics

  • Random Variables
  • Equations
  • Standard Deviation
  • LCM and GCD
  • Linear Equations
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®