central angle

noun

, Geometry.

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

central angle

noun

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

central angle

/ sĕn′trəl /

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

Word History and Origins

Origin of central angle¹

First recorded in 1900–05

Example Sentences

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

From Project Gutenberg

And midway between Harry Urquhart and the half-caste guide, standing upright at the central angle, was Sheikh Bayram, the Black Dog of the Cameroons, like a great bird of prey perched above its eyrie.

From Project Gutenberg

This makes each base angle 72° and the vertical angle 36°, the latter being the central angle of a regular decagon,—essentially our present method.

From Project Gutenberg

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

From Project Gutenberg

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

From Project Gutenberg