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


Returns the starting point of a line segment (that is, the first argument of its constructor).

Formal properties

starting_point_of_directed_line_segment(P,s), directed_line_segment_by_points(s,A,B) => P=A


  1. directed_line_segment example: source JSXGraph