Right-Angle Half Fold Brochure Defined

Panels are two-sided sections of the final printed brochure, and 
a right-angle half fold brochure has four panels. 

A page is one side of a brochure panel, and a right-angle half 
fold brochure has eight pages.

For right-angle half fold brochures, the paper is folded in half 
horizontally, and then in half once again vertically.