C.a.R. > Applications > Analytic Geometry > Adding Vectors
Demo for adding vectors. Moving with the left mouse button snaps the points.
The text field contains this LaTeX expression in one line:
${%x(P)% \choose %y(P)%} +{%x(Q)-x(P)% \choose %y(Q)-y(P)%} ={%x(Q)% \choose %y(Q)%}$