If in doubt, use the map - especially engineers, I know this is a last resort but I had to put one somewhere . . . .
Evidently, not all churches have the same layout or even the same combination of areas . . . or indeed, not even symmetrical in layout but this map gives the general idea of where to find areas described in this website
The terms based on the traditional church architectural layout, the congregation facing the altar in the east so as to see the prophesied return of Jesus.
Descriptions bracketed give the general layout 'alternative name' for modern halls.