This is the 5966th most frequent Russian word.
сектор
"Sector" - a distinct part or area, often of a field, activity, or circle.
Here, 'сектор' is used in a mathematical or geometrical context to denote a specific part of a circular area.
В геометрии сектор — это часть круга, ограниченная двумя радиусами и дугой.
In geometry, a sector is a part of a circle bounded by two radii and an arc.
In this sentence, 'сектор' refers to a designated section or area for seating within a larger venue.
На стадионе я сидел в секторе B.
At the stadium, I sat in sector B.
Here, 'сектор' is used to describe a broad operational domain within an economy, indicating a specific industry or type of economic activities.