Circumradius

/ˌsɜrkəmˈreɪdiəs/ noun

Definition

The radius of a circle that passes through all vertices of a polygon.

Etymology

From Latin circum- (around) + radius (ray or spoke of a wheel), a geometric term used since the 18th century to describe the circumscribed circle's measurement.

Kelly Says

The circumradius of a triangle is related to its side lengths by one of math's most elegant formulas—it's a hidden connection between a shape's sides and the circle it fits perfectly into.

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