"central angle" is correct and usable in written English.
You can use it when referring to the angle formed by two radii in a circle - the angle formed at the centre of the circle. Here is an example sentence: The central angle of the circle was 120 degrees.
Its length is in the same proportion to the circumference as the central angle is to a full revolution.
Theoretically, the ideal constant angle arch in a V-shaped valley has a central angle of 133° of curvature.
An arc consists of any part of a circle encompassed by an angle with its vertex at the centre (central angle).
To compute the various parts of the triangle, one has to find the length of each chord as a function of the central angle that subtends it or, equivalently, the length of a chord as a function of the corresponding arc width.
Chapters 10 and 11 of the first book of the Almagest deal with the construction of a table of chords, in which the length of a chord in a circle is given as a function of the central angle that subtends it, for angles ranging from 0° to 180° at intervals of one-half degree.
Because a trigonometric function of a central angle and its corresponding arc have the same value, spherical trigonometry formulas are given in terms of the spherical angles A, B, and C and, interchangeably, in terms of the arcs a, b, and c and the dihedral angles α, β, and γ.
There are three observation angles of a spotlight SAR: 77.5°∼82.5°, the central angle is 80° 87.5°∼92.5°, the central angle is 90° 97.5°∼102.5°, the central angle is 100°.
For example, the oxygen-specific pins and holes produce a central angle of 180°, whereas the nitrous oxide-specific pins and holes exhibit a central angle of 135°.
Fig. 6 RMSE for the central angle versus the source number.
where is the central angle of the incoming rays to the BS from the th user.
The maximum different value between two levels of central angle was 0.41 N·m.
