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

See Examples For:

central angle

A sector of a circle has a central angle of 45° and a radius 6 cm.

From Textbooks ● Dec. 1, 2021

A sector of a circle has a central angle of 30° and a radius of 20 cm.

From Textbooks ● Dec. 1, 2021

One radian is the measure of a central angle of a circle that intercepts an arc equal in length to the radius of that circle.

From Textbooks ● Feb. 13, 2015

Find the length of the arc of a circle of radius 12 inches subtended by a central angle of radians.

From Textbooks ● Feb. 13, 2015

There, sure enough, was Fernando, crawling on hands and knees, his head and shoulders just appearing around the central angle.

From Across the Cameroons A Story of War and Adventure by Gilson, Charles