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

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