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260:. Each two circles in the pencil are concentric, and have different radii. Every point in the plane, except for the shared center, belongs to exactly one of the circles in the pencil. Every two disjoint circles, and every hyperbolic pencil of circles, may be transformed into a set of concentric circles by a
60:
148:, two circles that are concentric necessarily have different radii from each other. However, circles in three-dimensional space may be concentric, and have the same radius as each other, but nevertheless be different circles. For example, two different
312:, a type of mechanic sights commonly found on target rifles. They usually feature a large disk with a small-diameter hole near the shooter's eye, and a front globe sight (a circle contained inside another circle, called
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is a type of electrical cable in which the combined neutral and earth core completely surrounds the live core(s) in system of concentric cylindrical shells.
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formed by dropping a small object into still water naturally form an expanding system of concentric circles. Evenly spaced circles on the targets used in
559:
The
American universal geography;: or, A view of the present state of all the kingdoms, states, and colonies in the known world, Volume 1
301:
Concentric circles have been used on firearms surfaces as means of holding lubrication or reducing friction on components, similar to
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116:(line of symmetry). Geometric objects with a well-defined axis include circles (any line through the center), spheres,
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316:). When these sights are correctly aligned, the point of impact will be in the middle of the front sight circle.
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602:, Dolciani Mathematical Expositions, vol. 47, Mathematical Association of America, p. 140,
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85:. Any pair of (possibly unalike) objects with well-defined centers can be concentric, including
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envisioned a cosmological system formed by concentric regular polyhedra and spheres.
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the radius of one is twice the radius of the other, in which case the triangle is
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210:-gon itself, are concentric. For the circumradius-to-inradius ratio for various
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of a triangle, two concentric circles (with that distance being zero) are the
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Kepler's cosmological model formed by concentric spheres and regular polyhedra
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or similar sports provide another familiar example of concentric circles.
241:, and analogously the region of space between two concentric spheres is a
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of the earth (approximated as a sphere). More generally, every two
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576:"Non-Euclidean versions of some classical triangle inequalities"
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on a sphere are concentric with each other and with the sphere.
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Brannan, David A.; Esplen, Matthew F.; Gray, Jeremy J. (2011),
473:
237:
The region of the plane between two concentric circles is an
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Concentric objects are often part of the broad category of
781:"Behind Enemy Lines: Sterling Hayden's Registered Magnum"
629:, MAA Spectrum, Cambridge University Press, p. 142,
686:, Society for Promoting Christian Knowledge, p. 20
101:, parallelograms, cones, conic sections, and quadrics.
429:
Alexander, Daniel C.; Koeberlein, Geralyn M. (2009),
656:, Cambridge University Press, pp. 320–321,
562:(6th ed.), Thomas & Andrews, p. 19
120:, conic sections, and surfaces of revolution.
758:(2nd ed.), Academic Press, p. 436,
8:
698:Haywood, Kathleen; Lewis, Catherine (2006),
252:in the plane, the set of all circles having
156:are concentric with each other and with the
529:Cole, George M.; Harbin, Andrew L. (2009),
350:, in a typical expanding circular pattern.
574:Dragutin Svrtan and Darko Veljan (2012),
51: circles that surround a "
432:Elementary Geometry for College Students
582:, Forum Geometricorum, pp. 197–209
448:
420:
318:
198:The circumcircle and the incircle of a
27:Geometric objects with a common centre
308:Concentric circles are also found in
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535:, www.ppi2pass.com, §2, p. 6,
502:Spurk, Joseph; Aksel, Nuri (2008),
464:, The University Press, p. 107
216:Bicentric polygon#Regular polygons
25:
704:, Human Kinetics, p. xxiii,
435:, Cengage Learning, p. 279,
802:Concentric circles demonstration
728:Fiber Optics Standard Dictionary
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336:
321:
362:Tree rings, as can be used for
1:
755:Geometry and Its Applications
626:Complex Numbers and Geometry
461:A Course of Pure Mathematics
218:. The same can be said of a
171:on the distance between the
476:, Pergamon Press, pp.
470:Gillard, Robert D. (1987),
169:Euler's theorem in geometry
34:Concentric (disambiguation)
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804:With interactive animation
398:Magic circle (mathematics)
47:, featuring evenly spaced
31:
752:Meyer, Walter A. (2006),
731:, Springer, p. 124,
701:Archery: Steps to Success
678:Fleming, Sir John Ambrose
623:Hahn, Liang-shin (1994),
532:Surveyor Reference Manual
508:, Springer, p. 174,
268:Applications and examples
81:when they share the same
599:New Horizons in Geometry
556:Morse, Jedidiah (1812),
295:Mysterium Cosmographicum
256:as their center forms a
112:if they share the same
130:, which also includes
104:Geometric objects are
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56:
779:Elliot, Dave (2018),
725:Weik, Martin (1997),
456:Hardy, Godfrey Harold
262:Möbius transformation
62:
42:
818:Corrosion prevention
378:Centered cube number
140:Geometric properties
32:For other uses, see
785:American Handgunner
468:Regular polyhedra:
453:Regular polygons:
348:Pacinian corpuscle
248:For a given point
220:regular polyhedron
206:, and the regular
65:
57:
823:Geometric centers
580:forumgeom.fau.edu
403:Osculating circle
393:Circular symmetry
258:pencil of circles
152:of a terrestrial
99:regular polyhedra
16:(Redirected from
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193:equilateral
812:Categories
800:Geometry:
415:References
78:concentric
49:concentric
18:Concentric
447:Spheres:
427:Circles:
344:Histology
303:jewelling
228:midsphere
150:meridians
118:cylinders
680:(1902),
653:Geometry
596:(2013),
478:137, 139
458:(1908),
388:Focaloid
383:Homoeoid
371:See also
331:in water
224:insphere
200:regular
185:incircle
177:incenter
128:patterns
69:geometry
53:bullseye
329:Ripples
274:ripples
239:annulus
144:In the
133:spirals
126:whorled
108:coaxial
91:spheres
87:circles
73:objects
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408:Spiral
314:tunnel
214:, see
83:center
346:of a
158:globe
154:globe
760:ISBN
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706:ISBN
658:ISBN
631:ISBN
604:ISBN
537:ISBN
510:ISBN
482:ISBN
437:ISBN
272:The
230:and
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183:and
175:and
114:axis
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