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Angle AOB is a central angle. A central angle is an angle whose apex (vertex) is the center O of a circle and whose legs (sides) are radii intersecting the circle in two distinct points A and B. Central angles are subtended by an arc between those two points, and the arc length is the central angle of a circle of radius one (measured in radians). [1]
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In circle O, angle AOB forms a central angle and defines a sector (shown in light red). Minor arc AB is formed by tracing the circle clockwise from A to B. Major arc BA is formed by tracing the circle clockwise from B to A. Date: 17 December 2011 13:51:44(UTC) (Originally uploaded at 2011-12-17 13:44:39) Source
1. Center line, the central axis of a feature. 2. Class, for example, "paint per spec XYZ revision C type 1 class 2" may be abbreviated as "paint per spec XYZ REV C TY 1 CL 2" or even in some cases "paint per spec XYZ-C-1-2". (The latter practice is not uncommon but is cryptic for workers with minimal training and experience. The first two ...
What can be stated is that as the central angle gets smaller (or alternately the radius gets larger), the area a rapidly and asymptotically approaches . If θ ≪ 1 {\displaystyle \theta \ll 1} , a = 2 3 c ⋅ h {\displaystyle a={\tfrac {2}{3}}c\cdot h} is a substantially good approximation.
The Miscellaneous Mathematical Symbols-B block (U+2980–U+29FF) contains miscellaneous mathematical symbols, including brackets, angles, and circle symbols. Miscellaneous Mathematical Symbols-B [1] Official Unicode Consortium code chart (PDF)
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