how do i find the center of a face?

[stevencg]

I am new at Autocad. How do i select the center of a face or suface. 

For example: i have a 4 sided rectangle and i want a hole in the center. 

Also what is the diffence between inventor fusion and autocad fusion, are they the same?

TIA!

[JDMather]

I recommend you start here

http://au.autodesk.com/?nd=class_listing&filter_keywords=fusion&chunk=15&filter_track=&filter_softwa...