Circular segment

In geometry, a circular segment or disk segment (symbol: ⌓) is a region of a disk^[1] which is "cut off" from the rest of the disk by a straight line. The complete line is known as a secant, and the section inside the disk as a chord.^[2]

More formally, a circular segment is a plane region bounded by a circular arc (of less than π radians by convention) and the circular chord connecting its endpoints.

^ Mathematics distinguishes when necessary between the words circle and disk: a disk is a plane area having a circle as its boundary, while a circle is the closed curve forming the boundary itself.
^ These terms refer to a line which intersects a curve. In this case, the curve is the circle forming the disk's boundary.

[1] Mathematics distinguishes when necessary between the words circle and disk: a disk is a plane area having a circle as its boundary, while a circle is the closed curve forming the boundary itself.

[2] These terms refer to a line which intersects a curve. In this case, the curve is the circle forming the disk's boundary.

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