Entering Vectors

Vectors can be created using the Vector or Vector from Point tools in the third menu. Vector joins two points A and B with the vector AB.   Vector from Point will translate an existing vector so that it starts from a point. Alternatively enter a set of coordinates with a lower-case name will create the object as a position vector, e.g. v=(2,3,-1) Line[A,v] will create a a line through point A in the direction v. Planes can be entered directly in Cartesian form: e.g. 2x+3y-z=2.

Notes about the 3D view

View > 3D Graphics displays the 3D view. The toolbar in 3D view allows 3D objects to be created. Tomove a point click on it once for the x & y directions and twice for the z direction. Objectsfrom the 2D view will be displayed in the x-y plane of the 3D view.