cyclic quadrilateral - meaning and definition. What is cyclic quadrilateral
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What (who) is cyclic quadrilateral - definition

QUADRILATERAL WHOSE VERTICES CAN ALL FALL ON A SINGLE CIRCLE
Cyclic quadrilaterals; Cyclic quad; Concyclic quadrilateral; Brahmagupta quadrilateral; Inscribed quadrilateral
  • ''ABCD'' is a cyclic quadrilateral. ''EFG'' is the diagonal triangle of ''ABCD''. The point ''T'' of intersection of the bimedians of ''ABCD'' belongs to the nine-point circle of ''EFG''.
  • A cyclic quadrilateral ABCD

Cyclic peptide         
  • α-Amanitin]]
  • [[Bacitracin]]
  • [[Ciclosporin]]
PEPTIDE CHAINS WHICH CONTAIN A CIRCULAR SEQUENCE OF BONDS
Cyclic peptides; Peptides, cyclic; Cyclic polypeptides; Cyclic protein; Cyclic polypeptide; Cyclopeptides; Cyclopeptide; Peptide macrocycle
Cyclic peptides are polypeptide chains which contain a circular sequence of bonds. This can be through a connection between the amino and carboxyl ends of the peptide, for example in cyclosporin; a connection between the amino end and a side chain, for example in bacitracin; the carboxyl end and a side chain, for example in colistin; or two side chains or more complicated arrangements, for example in amanitin.
Saccheri quadrilateral         
  • 160px
  • 160px
QUADRILATERAL WITH TWO EQUAL SIDES PERPENDICULAR TO THE BASE
Khayyam-Saccheri quadrilateral; Saccheri Quadrilateral; Khayyam–Saccheri quadrilateral; Khayyam quadrilateral
A Saccheri quadrilateral (also known as a Khayyam–Saccheri quadrilateral) is a quadrilateral with two equal sides perpendicular to the base. It is named after Giovanni Gerolamo Saccheri, who used it extensively in his book Euclides ab omni naevo vindicatus (literally Euclid Freed of Every Flaw) first published in 1733, an attempt to prove the parallel postulate using the method Reductio ad absurdum.
Cyclic order         
TERNARY RELATION THAT IS CYCLIC (IF [𝑥,𝑦,𝑧] THEN [𝑧,𝑥,𝑦]), ASYMMETRIC (IF [𝑥,𝑦,𝑧] THEN NOT [𝑧,𝑦,𝑥]), TRANSITIVE (IF [𝑤,𝑥,𝑦] AND [𝑤,𝑦,𝑧] THEN [𝑤,𝑥,𝑧]) AND CONNECTED (FOR DISTINCT 𝑥,𝑦,𝑧
Cyclic sequence; Circular order; Circular ordering; Total cyclic order; Cyclically ordered set; Cyclic ordering; Complete cyclic order; Linear cyclic order; L-cyclic order; Circularly ordered set
In mathematics, a cyclic order is a way to arrange a set of objects in a circle. Unlike most structures in order theory, a cyclic order is not modeled as a binary relation, such as "".

Wikipedia

Cyclic quadrilateral

In Euclidean geometry, a cyclic quadrilateral or inscribed quadrilateral is a quadrilateral whose vertices all lie on a single circle. This circle is called the circumcircle or circumscribed circle, and the vertices are said to be concyclic. The center of the circle and its radius are called the circumcenter and the circumradius respectively. Other names for these quadrilaterals are concyclic quadrilateral and chordal quadrilateral, the latter since the sides of the quadrilateral are chords of the circumcircle. Usually the quadrilateral is assumed to be convex, but there are also crossed cyclic quadrilaterals. The formulas and properties given below are valid in the convex case.

The word cyclic is from the Ancient Greek κύκλος (kuklos), which means "circle" or "wheel".

All triangles have a circumcircle, but not all quadrilaterals do. An example of a quadrilateral that cannot be cyclic is a non-square rhombus. The section characterizations below states what necessary and sufficient conditions a quadrilateral must satisfy to have a circumcircle.