
Re: What does one call vector geometry without a coordinate system?
Posted:
Aug 30, 2013 8:29 PM


On Friday, August 30, 2013 4:30:23 PM UTC7, lite.o...@gmail.com wrote: > I remember in grade school (grade 8 or 9ish) we did geometry with vectors as a tool but without any coordinate system. > > We often picked a random point and called it O, then proved things like if M was midpoint between two points A, B, then: > > OM = 1/2 * (OA + OB) > > A lot of stuff was proven with just points and vectors from points to other points (with the fact OX = XO used heavily). > > What's the name of this geometry? I'm thinking of looking this stuff up again.
Affine Geometry http://persweb.wabash.edu/facstaff/footer/courses/M225/Handouts/Affine.pdf http://www.youtube.com/watch?v=FdgMmHIXA_s

