Contents
Volume 1 (2006)
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Deko Dekov, Apollonius Circle,
PDF, 134 KB.
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Deko Dekov, Apollonius Problem
PDF, 139 KB.
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Deko Dekov, Compositions of Transformations in Triangle Geometry
PDF, 36 KB.
Volume 1 (2006) All Articles, PDF, 240 KB.
Volume 2 (2007)
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Deko Dekov, The Ambiguities of the Natural Language
PDF, 46 KB.
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Deko Dekov, Triangulation Triangles
PDF, 175 KB.
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Deko Dekov, Stevanovic Triangles PDF, 125 KB.
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Deko Dekov, Corner Triangles
PDF, 91 KB.
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Deko Dekov, Anticevian Corner Triangles PDF, 101 KB.
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Deko Dekov, Incenter
PDF, 68 KB.
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Deko Dekov, Grinberg Triangles
PDF, 102 KB.
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Deko Dekov, Hatzipolakis Triangles
PDF, 46 KB.
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Deko Dekov, Malfatti Squares Triangle
PDF, 57 KB.
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Deko Dekov, Construction of the Malfatti Squares Triangle
PDF, 143 KB.
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Deko Dekov, Symmedian Point
PDF, 70 KB.
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Deko Dekov, Triangles of Reflections. Part 1
PDF, 74 KB.
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Deko Dekov, Triangles of Reflections. Part 2
PDF, 102 KB.
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Deko Dekov, Triangles of Reflections. Part 3
PDF, 146 KB.
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Deko Dekov, Euler Triangles
PDF, 139 KB.
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Deko Dekov, Orthocenter
PDF, 69 KB.
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Deko Dekov, Half-Cevian Triangles
PDF, 105 KB.
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Deko Dekov, Half-Anticevian Triangles
PDF, 63 KB.
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Deko Dekov, Centroid
PDF, 105 KB.
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Deko Dekov, Circumcenter
PDF, 129 KB.
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Deko Dekov, Nine-Point Center
PDF, 63 KB.
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Deko Dekov, Gergonne Point
PDF, 44 KB.
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Deko Dekov, Nagel Point
PDF, 46 KB.
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Deko Dekov, Mittenpunkt
PDF, 38 KB.
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Deko Dekov, Spieker Center
PDF, 46 KB.
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Deko Dekov, Grinberg Point
PDF, 85 KB.
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Deko Dekov, Gibert Point
PDF, 97 KB.
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Deko Dekov, Side Triangles
PDF, 81 KB.
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Deko Dekov, Moses Point
PDF, 77 KB.
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Deko Dekov, Skordev Point
PDF, 94 KB.
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Deko Dekov, Inner Johnson Triangles
PDF, 133 KB.
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Deko Dekov, Apollonius Triangles
PDF, 166 KB.
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Deko Dekov, Moses Triangles
PDF, 220 KB.
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Deko Dekov, de Longchamps Point
PDF, 96 KB.
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Deko Dekov, Weill Point
PDF, 61 KB.
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Deko Dekov, Congruent Isoscelizers Point
PDF, 38 KB.
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Deko Dekov, Yff Center of Conguence
PDF, 51 KB.
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Deko Dekov, Equal Parallelians Point
PDF, 47 KB.
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Deko Dekov, Fuhrmann Center
PDF, 64 KB.
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Deko Dekov, Grebe Triangles
PDF, 225 KB.
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Deko Dekov, Equilateral Triangles
PDF, 90 KB.
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Deko Dekov, Outer Fermat Point
PDF, 62 KB.
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Deko Dekov, Inner Fermat Point
PDF, 38 KB.
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Deko Dekov, Outer Vecten Point
PDF, 66 KB.
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Deko Dekov, Inner Vecten Point
PDF, 41 KB.
Volume 2 (2007) All Articles, PDF, 2.61 MB.
Volume 3 (2008)
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Deko Dekov, First Isodynamic Point
PDF, 103 KB.
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Deko Dekov, Second Isodynamic Point
PDF, 67 KB.
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Deko Dekov, Kenmotu Points
PDF, 136 KB.
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Deko Dekov, Napoleon Points
PDF, 57 KB.
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Deko Dekov, Gallatly-Kiepert Triangles
PDF, 127 KB.
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Deko Dekov, Construction of the Outer Gallatly-Kiepert Triangle
PDF, 132 KB.
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Deko Dekov, Gallatly-Kiepert Points
PDF, 111 KB.
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Deko Dekov, Lemoine-Kiepert Triangles
PDF, 162 KB.
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Deko Dekov, Lemoine-Kiepert Points
PDF, 84 KB.
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Hristo Milev, New Constructions of the Outer Gallatly-Kiepert Triangle
PDF, 55 KB.
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Deko Dekov, Fermat Triangles
PDF, 89 KB.
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Deko Dekov, Intangents Triangle
PDF, 99 KB.
Problems for school students and teachers
About the problems
Feuerbach Point
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The Feuerbach Point lies on the Circle through the Symmedian Point,
the Internal Center of Similitude of the Incircle and the Circumcircle
and the Grinberg Point
PDF, 27 KB.
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The Feuerbach Point is the Centroid of the Hatzipolakis
Triangle of the Feuerbach Point
PDF, 27 KB.
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The Feuerbach Point is the Circumcenter of the Desmic Mate
the Outer Yff Triangle
PDF, 30 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle and the Triangle
of the Incenters of the Corner Triangles of the Orthocenter
PDF, 31 KB.
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The Feuerbach Point lies on the Parry Circle of the Intouch Triangle
PDF, 27 KB.
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The Feuerbach Point lies on the Nine-Point Circle of
the Outer Yff Triangle
PDF, 30 KB.
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The Feuerbach Point lies on the Cevian Circle of the Mittenpunkt
PDF, 28 KB.
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The Feuerbach Point lies on the Pedal Circle of the Mittenpunkt
PDF, 27 KB.
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The Feuerbach Point is the External Center of Similitude of the
Circumcircle and the Outer Johnson-Yff Circle
PDF, 27 KB.
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The Feuerbach Point lies on the Cevian Circle of the Schiffler Point
PDF, 33 KB.
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The Feuerbach Point lies on the Pedal Circle of the Schiffler Point
PDF, 34 KB.
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The Feuerbach Point lies on the Cevian Circle of the Yff Center of Conguence
PDF, 27 KB.
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The Feuerbach Point lies on the Pedal Circle of the Gergonne Point
PDF, 26 KB.
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The Feuerbach Point lies on the Pedal Circle of the Nagel Point
PDF, 26 KB.
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The Feuerbach Point lies on the Pedal Circle of the Moses Point
PDF, 26 KB.
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The Feuerbach Point lies on the Pedal Circle of the Weill Point
PDF, 29 KB.
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The Feuerbach Point lies on the Pedal Circle of the Evans Perspector
PDF, 30 KB.
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The Feuerbach Point is the Inverse of the Incenter in the Nine-Point
Circle of the Fuhrmann Triangle
PDF, 27 KB.
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The Feuerbach Point is the Perspector of the Incentral Triangle and
the Feuerbach Triangle
PDF, 27 KB.
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The Feuerbach Point is the Homothetic Center of the Johnson Triangle
and the Outer Yff Triangle
PDF, 28 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Moses Points of the
Corner Triangles of the Orthocenter
PDF, 29 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Bevan Points of the
Corner Triangles of the Orthocenter
PDF, 29 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Internal Centers of Similitude of
the Incircles and the Circumcircles of the Corner Triangles of the Orthocenter
PDF, 30 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the External Centers of Similitude of the
Incircles and the Circumcircles of the Corner Triangles of the Orthocenter
PDF, 30 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Weill Points of the
Corner Triangles of the Orthocenter
PDF, 29 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Evans Perspectors of the Corner
Triangles of the Orthocenter
PDF, 29 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Orthocenters of the
Corner Triangles of the Gergonne Point
PDF, 29 KB.
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The Feuerbach Point is the Perspector of the Euler Triangle
and the Triangle of the Orthocenters of the
Corner Triangles of the Nagel Point
PDF, 29 KB.
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The Feuerbach Point is the Homothetic Center of the
Inner Yff Triangle and the Triangle of the Centers of the
Orthocentroidal Circles of the Triangulation Triangles of the Orthocenter
PDF, 31 KB.
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The Feuerbach Point is the Homothetic Center of the
Outer Yff Triangle and the Triangle of the Circumcenters of
the Triangulation Triangles of the Orthocenter
PDF, 30 KB.
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The Feuerbach Point is the Homothetic Center of the
Outer Yff Triangle and the Triangle of the Circumcenters of the
Anticevian Corner Triangles of the Centroid
PDF, 32 KB.
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The Feuerbach Point is the Homothetic Center of the
Outer Yff Triangle and the Triangle of the Orthocenters of the
Anticevian Corner Triangles of the Symmedian Point
PDF, 28 KB.
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The Feuerbach Point is the Homothetic Center of the
Outer Yff Triangle and the Triangle of reflections of the
Circumcenter in the vertices of the Medial Triangle
PDF, 29 KB.
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The Feuerbach Point is the Inverse of the
Incenter in the Second Droz-Farny Circle of the Fuhrmann Triangle
PDF, 27 KB.
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The Feuerbach Point is the External Center of Similitude
of the Circumcircle of the Johnson Triangle and the Circumcircle
of the Outer Yff Triangle
PDF, 29 KB.
Letters to the Editor
Dimiter Skordev, Letter to the Editor PDF, 20 KB.
Volume 3 (2008) All Articles, PDF, 798 KB.
Volume 3 (2008) All Problems for school students and teachers, PDF, 715 KB.
Volume 4 (2009)
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Deko Dekov, Computer-Generated Mathematics:
The Gergonne Point,
PDF, 91 KB.
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Deko Dekov, Computer-Generated Mathematics:
Eleven Circles passing through the Parry Point,
PDF, 31 KB.
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Deko Dekov, Computer-Generated Mathematics:
The Feuerbach Point,
PDF, 37 KB.
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Deko Dekov, Computer-Generated Mathematics:
The Kiepert-Parry Point,
PDF, 132 KB.
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Deko Dekov, Computer-Generated Mathematics:
The Pohoata Point,
PDF, 54 KB.
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Deko Dekov, Computer-Generated Mathematics:
The Schroder Point,
PDF, 65 KB.
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Deko Dekov, Computer-Generated Mathematics:
The Bevan-Schroder Point,
PDF, 48 KB.
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Deko Dekov, Computer-Generated Mathematics:
Construction of the Inner Apollonius Circle
of the Mixtilinear Incircles,
PDF, 42 KB.
Volume 4 (2009) All Articles, PDF, 437 KB.
Volume 5 (2010)
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Deko Dekov, Computer-Generated Mathematics:
The Stanilov Triangle,
PDF, 68 KB.
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Deko Dekov, Computer-Generated Mathematics:
Construction of the Stanilov Triangle,
PDF, 174 KB.
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