Crossword clues for semicircle
Longman Dictionary of Contemporary English
The Collaborative International Dictionary
Semicircle \Sem"i*cir`cle\, n.
The half of a circle; the part of a circle bounded by its diameter and half of its circumference.
A semicircumference.
A body in the form of half of a circle, or half of a circumference.
An instrument for measuring angles.
Douglas Harper's Etymology Dictionary
Wiktionary
n. 1 half of a circle. 2 An instrument for measuring angles.
WordNet
n. a plane figure with the shape of half a circle [syn: hemicycle]
Wikipedia
In mathematics (and more specifically geometry), a semicircle is a one-dimensional locus of points that forms half of a circle. The full arc of a semicircle always measures 180° (equivalently, radians, or a half-turn). It has only one line of symmetry ( reflection symmetry). In non-technical usage, the term "semicircle" is sometimes used to refer to a half- disk, which is a two-dimensional geometric shape that also includes the diameter segment from one end of the arc to the other as well as all the interior points.
By Thales' theorem, any triangle inscribed in a semicircle with a vertex at each of the endpoints of the semicircle and the third vertex elsewhere on the semicircle is a right triangle, with right angle at the third vertex.
All lines intersecting the semicircle perpendicularly are concurrent at the center of the circle containing the given semicircle.
Usage examples of "semicircle".
Boss had hardly finished his arrangements for the ring barrage, when one of the scouts on an eminence to the north, announced the approach of seven Han ships, spread out in a great semicircle.
Their number was seauen and seauen, so perfectly and sweetely counterfeited with liuelie motions, their vestures whisking vp and flying abroad, that the workman could not be accused of any imperfection, but that one had not a liuely voyce to expresse their mirth, and the other brinish teares to manifest their sorrow: the said daunce was in fashion of two Semicircles, with a seperating partition put betwixt.
In the reversed semicircle before her is another monogram, Uota or Tuota, a name which perhaps may be translated Uta, Utta, Ida, etc.
They clustered in a semicircle, just a little overclose for friendliness.
And she was there with rows of white teeth in the semicircle of her mouth, a tall fin on her back, dressed this time in shagreen, and her touch was cold as the ocean, and her taste was salt and the taint of dying things.
Nefar and Akan and I sprang apart, forming a loose semicircle between the two flames like wary herd animals trapped in a blind.
Peering around his tree, Caine studied the four Argentians walking in a rough semicircle behind Lathe, Valen, Kwon, and Spadafora.
In three dimensions and a variety and depth of hue as rich as the portraits on the walls, a semicircle of bemedaled officers sat around a table.
And then a great hanging parted at the rear of the dais behind the throne, and a warrior stepped out behind the semicircle of those that half-surrounded Bharata Rahon and his unwilling bride.
He pointed on the map to an overgrown path that formed, a rough semicircle around the campus and connected to the cableway at both ends approximately five thousand irals from the gates.
The Manni Henchick had chosen as senders six elders, plus Cantab formed their semicircle behind the door and around to its sides.
The biologist, the physician, the planetologist, the electronic engineer, the communication officer, the cyberneticist and the physicists were all seated, their armchairs arranged in a semicircle.
Standing in semicircles at equal distances from each other on the north and south of the sacred place are ten golden angels, or female winged forms, exquisitely shaped and draped.
The British still lay in a semicircle extending from Slingersfontein upon the right to Kloof Camp upon the left, and the general scheme of operations continued to be an enveloping movement upon the right.
Flames leapt up from the fatwood, catching on the log atop the fire-irons as the women arrayed themselves in the lightly carved low-backed chairs arranged in a semicircle in front of the fireplace.