central angle

American  

noun

Geometry.

1. an angle formed at the center of a circle by two radii.

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central angle British  

noun

1. an angle whose vertex is at the centre of a circle

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central angle Scientific  

/ sĕn′trəl /

1. An angle formed by two rays from the center of a circle, with the center forming the vertex.

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Etymology

Origin of central angle

First recorded in 1900–05

Example Sentences

Find the length of the arc of a circle of radius 5 inches subtended by the central angle of 220°.

From Textbooks • Dec. 1, 2021

Recall that, in a circle of radius r, the length s of an arc subtended by a central angle of θ radians is s = rθ.

From Textbooks • Mar. 30, 2016

Therefore a fraction of a circle can be measured by the central angle θ.

From Textbooks • Mar. 30, 2016

A central angle is an angle formed at the center of a circle by two radii.

From Textbooks • Feb. 13, 2015

Ephraemi this central angle is sometimes a little rounded: in Codd.

From A Plain Introduction to the Criticism of the New Testament, Vol. I. by Scrivener, Frederick Henry Ambrose