👉 In mathematics and computer science, a sector is one of the parts of an area that are bounded by two radii. A sector can be defined as a region within a circle or sphere, which is divided into equal parts by its diameter. For example, consider a sector centered at the origin (0, 0) with radius 1. The region enclosed by this sector and the x-axis is a quarter of a circle with radius 1. This quarter-circle has an area of π/