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→top: Short description: "perpendicular to the radius" is meaningless, since there are infinitely many radii and any line intersecting the circle is perpendicular to one of them. Tags: Mobile edit Mobile app edit Android app edit |
→top: Footnote for jargon (disk vs circle). Tags: Mobile edit Mobile app edit Android app edit |
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[[Image:Circularsegment.svg|frame|right|A circular segment (in green) is enclosed between a secant/chord (the dashed line) and the arc whose endpoints equal the chord's (the arc shown above the green area).]]
In [[geometry]], a '''circular segment''' (symbol: <span style="font-size:1.5em">⌓</span>), also known as a '''disk segment''', is a region of a [[disk (mathematics)|disk]]<ref>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.</ref> which is "cut off" from the rest of the disk by a [[secant line|secant]] or a [[chord (geometry)|chord]]. More formally, a circular segment is a region of [[Plane (mathematics)|two-dimensional space]] that is bounded by a [[circular arc]] (of less than π radians by convention) and by the [[circular chord]] connecting the endpoints of the arc.
== Formulae ==
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