[1] in mathematics, an annulus (pl. Annulus is a 2d shape made up of two concentric circles with a hole in between Annuli or annuluses) is the region between two concentric circles
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Informally, it is shaped like a ring or a hardware washer
The word annulus is borrowed from the latin word anulus or annulus.
The area of an annulus refers to the region enclosed between these two concentric circles, which lie in the same plane In the figure below, the green region represents the annulus Math explained in easy language, plus puzzles, games, quizzes, worksheets and a forum Think of an annulus as a circle with a concentric hole in it
An annulus is something you've probably seen in your everyday life The face of a cd or the colored rings on an archery target are two examples of objects that form a set of annuli Area of an annulus the.