alleryA ring-shaped region between two circles with the same centre is called what?
AAnnulus
BLens
CSector
DDisc
Answer & Solution
Correct answer: A. Annulus
1. The region between two concentric circles is a ring.
2. It is called an annulus.
3. A lens is the overlap of two discs and a disc is the full inside of one circle.
_Source: Wikipedia, Circle, Terminology_
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