翻訳と辞書 Words near each other ・ Cyclic nucleotide-gated channel alpha 4 ・ Cyclic nucleotide-gated ion channel ・ Cyclic number ・ Cyclic number (group theory) ・ Cyclic olefin copolymer ・ Cyclic order ・ Cyclic ozone ・ Cyclic peptide ・ Cyclic permutation ・ Cyclic Poets ・ Cyclic polytope ・ Cyclic prefix ・ Cyclic pump ・ Cyclic pyranopterin monophosphate ・ Cyclic pyranopterin monophosphate synthase ・ Cyclic quadrilateral ・ Cyclic reduction ・ Cyclic redundancy check ・ Cyclic salt ・ Cyclic sediments ・ Cyclic set ・ Cyclic sieving ・ Cyclic stress ・ Cyclic subspace ・ Cyclic succession ・ Cyclic surgery theorem ・ Cyclic symmetry in three dimensions ・ Cyclic voltammetry ・ Cyclic vomiting syndrome ・ Cyclic-guanylate-specific phosphodiesterase Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Cyclic quadrilateral ： ウィキペディア英語版 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 Greek ''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. ==Special cases== Any square, rectangle, isosceles trapezoid, or antiparallelogram is cyclic. A kite is cyclic if and only if it has two right angles. A bicentric quadrilateral is a cyclic quadrilateral that is also tangential and an ex-bicentric quadrilateral is a cyclic quadrilateral that is also ex-tangential. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cyclic quadrilateral」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.