Interoperable interactive geometry for Europe
I forgot my login data

Report a bug

Fan club

Quick Intro Videos
click to start movie
Create A Simple
GeoGebra Resource (25Mb)
click to start movie
Filing a review
click to start movie
Find a Resource

This platform is brought to you by the intergeo project, funded under the eContent Plus programme of the European commission and by partners


circle_by_three_points(s,A,B,C) states that s is the circumference passing through points A, B and C.

Formal properties

circle_by_three_points(s,A,B,C) => circle_by_three_points(s,A,C,B), circle_by_three_points(s,B,A,C),…


  1. center of circle by three points example: source JSXGraph
  2. rotating circle example: source JSXGraph