GEOMETRIA ESPACIAL

http://www.youtube.com/watch?v=Hojs0JppyeI
http://www.youtube.com/watch?v=zlv8rp0BsXQ
http://www.youtube.com/watch?v=M2O3cIcj3IQ
http://www.youtube.com/watch?v=MGgGaMe2Q8U
http://www.youtube.com/watch?v=cLngahnOn1I
http://www.youtube.com/watch?v=qcPKQJ7xrPY
http://www.youtube.com/watch?v=Ew-wQmwEMHw