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Tangential quadrilateral
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11	45rd IMO[removed]Problem 1. Let ABC be an acute-angled triangle with AB 6= AC. The circle with diameter BC intersects the sides AB and AC at M and N respectively. Denote by O the midpoint of the side BC. The bisectors of t Add to Reading List Source URL: media.hotnews.ro Language: English - Date: 2014-05-19 06:32:15 Triangle geometry Cyclic quadrilateral Triangle Circumscribed circle Circle Tangential quadrilateral Bicentric quadrilateral Geometry Quadrilaterals Triangles
12	39th International Mathematical Olympiad Taipei, Taiwan Day I July 15, [removed]In the convex quadrilateral ABCD, the diagonals AC and BD are perpendicular Add to Reading List Source URL: media.hotnews.ro Language: English - Date: 2014-05-19 06:27:33 Euclidean geometry Triangle geometry Cyclic quadrilateral Incircle and excircles of a triangle Triangle Integer Tangential quadrilateral Bicentric quadrilateral Geometry Quadrilaterals Mathematics
13	Three points on incircle Avni Pllana Problem: Let ABC be an arbitrary triangle. Construct points D, E, F on the incircle of triangle ABC, such that triples {C, D, E}, {B, E, F}, {A, F, D} are collinear respectively. Add to Reading List Source URL: trisectlimacon.webs.com Language: English Incircle and excircles of a triangle Triangles Conic sections Quadrilaterals Triangle Tangential quadrilateral Nine-point circle Geometry Triangle geometry Circles
14	May 27, [removed] May 27, 2014 Add to Reading List Source URL: jmh.nbed.nb.ca Language: English - Date: 2014-05-28 13:57:12 Curves Analytic geometry Differential topology Tangent Contact Tangent lines to circles Tangential quadrilateral Geometry Circles Differential geometry
15	FGcumulativeauthorindex.dvi Add to Reading List Source URL: forumgeom.fau.edu Language: English - Date: 2014-01-23 13:54:46 Circles Triangles Cyclic quadrilateral Bicentric quadrilateral Tangential quadrilateral Triangle Equilateral triangle Nine-point circle Malfatti circles Geometry Quadrilaterals Triangle geometry
16	46th International Mathematical Olympiad Second Day Merida, Mexico, Thursday 14 July 2005 Add to Reading List Source URL: olympiads.win.tue.nl Language: English - Date: 2005-07-13 16:36:56 Triangle geometry Triangle Pi Tangential quadrilateral Cyclic quadrilateral Geometry Quadrilaterals Triangles
17	Forum Geometricorum Volume[removed]–152. FORUM GEOM Add to Reading List Source URL: forumgeom.fau.edu Language: English - Date: 2012-05-02 08:53:18 Complete quadrangle Circumscribed circle Parallelogram Tangential quadrilateral Bicentric quadrilateral Geometry Quadrilaterals Cyclic quadrilateral
18	39. Fuss’ Problem of the Chord-Tangent Quadrilateral Find the relation between the radii and the line joining the centers of the circumscribed and inscribed circles of a bicentric quadrilateral. Add to Reading List Source URL: www2.washjeff.edu Language: English - Date: 2010-07-14 13:03:28 Conic sections Circles Bicentric quadrilateral Triangle geometry Incircle and excircles of a triangle Tangential quadrilateral Nine-point circle Geometry Quadrilaterals Polygons
19	Forum Geometricorum Volume[removed]–189. FORUM GEOM Add to Reading List Source URL: forumgeom.fau.edu Language: English - Date: 2012-06-01 13:13:06 Rectangle Circumscribed circle Complete quadrangle Circle Isogonal conjugate Parallelogram Tangential quadrilateral Geometry Quadrilaterals Cyclic quadrilateral
20	Published by the Applied Probability Trust c Applied Probability Trust 2001 Add to Reading List Source URL: ms.appliedprobability.org Language: English - Date: 2010-03-22 11:51:52 Conic sections Hexagon Circle Cyclic quadrilateral Tangential quadrilateral Geometry Quadrilaterals Polygons