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 30° and a radius of 20 cm.

From Textbooks ● Dec. 1, 2021

Find the length of the arc of a circle of radius 10 centimeters subtended by the central angle of 50°.

From Textbooks ● Dec. 1, 2021

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

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

From Textbooks ● Feb. 13, 2015

From the central angle corresponding to the arc on the surface, he calculated the radius and hence the circumference of the earth.

From Development of Gravity Pendulums in the 19th Century Contributions from the Museum of History and Technology, Papers 34-44 On Science and Technology, Smithsonian Institution, 1966 by Lenzen, Victor Fritz