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A circle is a shape consisting of all points in a plane that are at a given distance from a given point, the centre. The distance between any point of the circle and the centre is called the radius. The length of a line segment connecting two points on the circle and passing through the centre is called the diameter.
The Magic Circle is an 1886 oil painting in the Pre-Raphaelite style by John William Waterhouse. Two copies of the painting were produced. The two paintings and a study depict a witch or sorceress using a wand to draw a fiery magic circle on the Earth to create a ritual space for her ceremonial magic. As was common in the period, Waterhouse ...
The Map of Hell painting by Botticelli is one of the extant ninety-two drawings that were originally included in the illustrated manuscript of Dante's Divine Comedy. Artist. Sandro Botticelli. Year. mid-1480s-mid-1490s [1] Canto XVIII, part of the 8th circle of Hell. Dante and Virgil are each shown 6 times, descending through the 10 chasms of ...
A circular sector is shaded in green. Its curved boundary of length L is a circular arc. A circular arc is the arc of a circle between a pair of distinct points.If the two points are not directly opposite each other, one of these arcs, the minor arc, subtends an angle at the center of the circle that is less than π radians (180 degrees); and the other arc, the major arc, subtends an angle ...
Circle of confusion. In optics, a circle of confusion (CoC) is an optical spot caused by a cone of light rays from a lens not coming to a perfect focus when imaging a point source. It is also known as disk of confusion, circle of indistinctness, blur circle, or blur spot. In photography, the circle of confusion is used to determine the depth of ...
Since C = 2πr, the circumference of a unit circle is 2π. In mathematics, a unit circle is a circle of unit radius—that is, a radius of 1. [1] Frequently, especially in trigonometry, the unit circle is the circle of radius 1 centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane.
Halo (religious iconography) A halo (from Ancient Greek ἅλως (hálōs) 'threshing floor, disk'; [1][2] also called a nimbus, aureole, glory, or gloriole (Latin: gloriola, lit. 'little glory') is a crown of light rays, circle or disk of light [3] that surrounds a person in works of art. The halo occurs in the iconography of many religions ...
Secant line. In geometry, a secant is a line that intersects a curve at a minimum of two distinct points. [1] The word secant comes from the Latin word secare, meaning to cut. [2] In the case of a circle, a secant intersects the circle at exactly two points. A chord is the line segment determined by the two points, that is, the interval on the ...