The outside edge of an area is the perimeter.
The area where the congregation sits in a church is called the pews.
It is called a area.
The outside of an organism has a surface area.
The area of a church where christenings take place is called the baptistery.
Nave
The area outside of an angle is called an arc, all angles can be turned into circles and therefore their interior is the measurement and their exterior is an arc. The area in which an angle lies is called a plane of space.
subpolar
If in a pew in the Catholic church, the cushioned area is called a kneeler.
A diocese is the local area of the Church led by a bishop.
The church on the Antietam battlefield is called the Dunkard or Dunker church. Its true name was The German Church of Baptist Brethren.
Subconscious.