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Noun
1. circumscribed circle
Wikipedia definition
2. Circumscribed circleIn geometry, the circumscribed circle or circumcircle of a polygon is a circle which passes through all the vertices of the polygon. The center of this circle is called the circumcenter and its radius is called the circumradius. A polygon which has a circumscribed circle is called a cyclic polygon (sometimes a concyclic polygon, because the vertices are concyclic). All regular simple polygons, all triangles and all rectangles are cyclic.
Read “Circumscribed circle” on English Wikipedia
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Read “Circumscribed circle” on DBpedia

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