N-sided is a face that has more than four sides between the related verts.
more than two sides between related vertices*
the n is just a number that can be 3 or more. 
You can switch the direction a face is facing by reversing the normal
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Objective C, C#, Java, MEL. Python, C++, XML, JavaScript, XSLT, HTML, SQL, CSS, FXScript, Clips, SOAR, ActionScript, OpenGL, DirectX
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D