Annulus (mathematics) - Wikipedia
网页In mathematics, an annulus (pl.: annuli or annuluses) is the region between two concentric circles. Informally, it is shaped like a ring or a hardware washer. The word "annulus" is borrowed from the Latin word anulus or annulus meaning 'little ring'. The adjectival form is annular (as in annular eclipse).
Annulus - Definition, Meaning, Area Formula and Annulus …
网页An annulus is a plane figure formed between two concentric circles (the circles sharing a common center). The shape of the annulus is like a ring. Some of the real-life examples of annulus shape are finger-ring, dough-nut, a CD, etc.
Annulus - Math is Fun
网页An annulus is a flat shape like a ring. Its edges are two circles that have the same center. The face of a metal washer is an annulus. Something shaped like an annulus is said to be annular. Saturn has annular rings: Area.
Annulus - Definition, Formula, & Examples - Math Monks
网页2023年8月3日 · An annulus is a flat, ring-shaped structure made out of 2 circles. Another way of looking at it is a circular ring with a circular hole in it. Mathematically, it is the area between the 2 circles having a common center (concentric circles) lying in the same plane.
Annulus Definition (Illustrated Mathematics Dictionary) - Math is …
网页Illustrated definition of Annulus: The region between two circles with the same center (called Concentric Circles). It looks like a flattened...
Annulus - Definition, Formula, Examples - Cuemath
网页In mathematics, an annulus is a region between two concentric circles. It is shaped like a ring or a donut. A circle is not an annulus since it is a completely closed figure in a circular manner, whereas an annulus is a circular-shaped figure but with a hole in between.
Annulus - Math.net
网页An annulus (meaning little ring in Latin) is a ring-shaped figure between two concentric circles. Below are two examples. 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.
Annulus -- from Wolfram MathWorld
网页2024年8月22日 · The region lying between two concentric circles. The area of the annulus formed by two circles of radii a and b (with a>b) is A_ (annulus)=pi (a^2-b^2). The annulus is implemented in the Wolfram Language as Annulus [ {x, y}, {b, a}].
Annulus - Math word definition - Math Open Reference
网页An annulus is a flat ring shaped object, much like the throw-ring shown on the right. One way to think of it is a circular disk with a circular hole in it. The outer and inner circles that define the ring are concentric (share a common center point).
Understanding Annulus in Geometry – A Comprehensive Guide
网页2023年5月29日 · The annulus is a geometric shape that refers to the region between two concentric circles. It is described as the collection of all points in a plane inside and outside the outer circle.