Following these instructions when you need to illustrate vectors of given lengths will prove useful. That said, these instructions are intended more as a general guide than something you will use directly on exams or assignments.
GeoGebra
Instruction 1
Circle: Center & Radius
tool from the list in the sixth pane. Point on Object
. Click on the circle. Vector
tool. Click on the center of the circle, and then press the point on the circle where you want the vector to go. You have now drawn a vector of a given length.