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34 relations: Annulus (mathematics), Apollonian circles, Capillary wave, Centered cube number, Centre (geometry), Circle, Circular symmetry, Circumscribed circle, Coaxial cable, Coordinate system, Cylinder, Diopter sight, Equilateral triangle, Euler's theorem in geometry, Focaloid, Geometry, Globe, Great circle, Homoeoid, If and only if, Incenter, Incircle and excircles of a triangle, Johannes Kepler, Magic circle (mathematics), Mathematical object, Möbius transformation, Meridian (astronomy), Mysterium Cosmographicum, Regular polygon, Regular polyhedron, Sphere, Spherical shell, Target archery, Two-dimensional space.
Annulus (mathematics)
In mathematics, an annulus (the Latin word for "little ring" is anulus/annulus, with plural anuli/annuli) is a ring-shaped object, a region bounded by two concentric circles.
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Apollonian circles
Apollonian circles are two families of circles such that every circle in the first family intersects every circle in the second family orthogonally, and vice versa.
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Capillary wave
A capillary wave is a wave traveling along the phase boundary of a fluid, whose dynamics and phase velocity are dominated by the effects of surface tension.
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Centered cube number
A centered cube number is a centered figurate number that counts the number of points in a three-dimensional pattern formed by a point surrounded by concentric cubical layers of points, with i 2 points on the square faces of the i-th layer.
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Centre (geometry)
In geometry, a centre (or center) (from Greek κέντρον) of an object is a point in some sense in the middle of the object.
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Circle
A circle is a simple closed shape.
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Circular symmetry
In geometry, circular symmetry is a type of continuous symmetry for a planar object that can be rotated by any arbitrary angle and map onto itself.
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Circumscribed circle
In geometry, the circumscribed circle or circumcircle of a polygon is a circle which passes through all the vertices of the polygon.
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Coaxial cable
Cross-sectional view of a coaxial cable Coaxial cable, or coax (pronounced), is a type of electrical cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield.
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Coordinate system
In geometry, a coordinate system is a system which uses one or more numbers, or coordinates, to uniquely determine the position of the points or other geometric elements on a manifold such as Euclidean space.
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Cylinder
A cylinder (from Greek κύλινδρος – kulindros, "roller, tumbler"), has traditionally been a three-dimensional solid, one of the most basic of curvilinear geometric shapes.
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Diopter sight
The diopter is an aperture sight component used to assist the aiming of devices, mainly firearms, airguns, and crossbows.
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Equilateral triangle
In geometry, an equilateral triangle is a triangle in which all three sides are equal.
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Euler's theorem in geometry
In geometry, Euler's theorem states that the distance d between the circumcentre and incentre of a triangle is given by.
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Focaloid
In geometry, a focaloid is a shell bounded by two concentric, confocal ellipses (in 2D) or ellipsoids (in 3D).
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Geometry
Geometry (from the γεωμετρία; geo- "earth", -metron "measurement") is a branch of mathematics concerned with questions of shape, size, relative position of figures, and the properties of space.
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Globe
A globe is a spherical model of Earth, of some other celestial body, or of the celestial sphere.
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Great circle
A great circle, also known as an orthodrome, of a sphere is the intersection of the sphere and a plane that passes through the center point of the sphere.
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Homoeoid
A homoeoid is a shell (a bounded region) bounded by two concentric, similar ellipses (in 2D) or ellipsoids (in 3D).
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If and only if
In logic and related fields such as mathematics and philosophy, if and only if (shortened iff) is a biconditional logical connective between statements.
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Incenter
In geometry, the incenter of a triangle is a triangle center, a point defined for any triangle in a way that is independent of the triangle's placement or scale.
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Incircle and excircles of a triangle
In geometry, the incircle or inscribed circle of a triangle is the largest circle contained in the triangle; it touches (is tangent to) the three sides.
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Johannes Kepler
Johannes Kepler (December 27, 1571 – November 15, 1630) was a German mathematician, astronomer, and astrologer.
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Magic circle (mathematics)
Magic circles were invented by the Song dynasty (960–1279) Chinese mathematician Yang Hui (c. 1238–1298).
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Mathematical object
A mathematical object is an abstract object arising in mathematics.
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Möbius transformation
In geometry and complex analysis, a Möbius transformation of the complex plane is a rational function of the form of one complex variable z; here the coefficients a, b, c, d are complex numbers satisfying ad − bc ≠ 0.
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Meridian (astronomy)
In astronomy, the meridian is the great circle passing through the celestial poles, the zenith, and the nadir of an observer's location.
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Mysterium Cosmographicum
Mysterium Cosmographicum (lit. The Cosmographic Mystery, alternately translated as Cosmic Mystery, The Secret of the World, or some variation) is an astronomy book by the German astronomer Johannes Kepler, published at Tübingen in 1596 and in a second edition in 1621.
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Regular polygon
In Euclidean geometry, a regular polygon is a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length).
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Regular polyhedron
A regular polyhedron is a polyhedron whose symmetry group acts transitively on its flags.
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Sphere
A sphere (from Greek σφαῖρα — sphaira, "globe, ball") is a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball (viz., analogous to the circular objects in two dimensions, where a "circle" circumscribes its "disk").
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Spherical shell
In geometry, a spherical shell is a generalization of an annulus to three dimensions.
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Target archery
Modern competitive archery is governed by the World Archery Federation (abbreviated WA), formerly FITA – Fédération Internationale de Tir à l'Arc.
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Two-dimensional space
Two-dimensional space or bi-dimensional space is a geometric setting in which two values (called parameters) are required to determine the position of an element (i.e., point).
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References
[1] https://en.wikipedia.org/wiki/Concentric_objects
