Geometry Triangles, Theorems and Problems
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Triangle
Problems |
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Euclid's Elements
Book I, 23 Definitions.
One-page visual illustration.
Triangles: Equilateral, Isosceles, Scalene. |
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Triangles
and Lissajous Art |
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Triangle definition
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Meanings and syntactic of 'TRIANGLE'.
Created using Wordflex Touch Dictionary for iPad in association with Oxford University Press. |
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Points, Theorems and Problems - Index.
non-collinear points. Triangle vertices. |
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Equilateral Triangles Index. |
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Isosceles Triangle. |
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Isosceles Triangle
80-20-80. Index. |
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Right Triangle. |
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Special Right Triangles.
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Special Right Triangle
30-60.
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Obtuse Triangle. |
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Altitude Index.
Theorems and Problems. |
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Geometric Art: Orthocenter of a Triangle, Delaunay Triangulation. |
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GeoGebra, Dynamic Geometry:
Internal Feuerbach Point
HTML5 Animation for Tablets (iPad, Nexus..) |
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GeoGebra, Dynamic Geometry:
Nine Point Circle
HTML5 Animation for Tablets (iPad, Nexus..) |
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iPad Apps:
fractBG, Triangle.
Fractal Image with Triangles. |
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GeoGebra, Dynamic Geometry:
Lemoine Line
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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GeoGebra, Dynamic Geometry:
Simson Line
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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GeoGebra, Dynamic Geometry:
Euler Line
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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GeoGebra, Dynamic Geometry: Incenter and Incircle
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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GeoGebra, Dynamic Geometry:
Centroid
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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GeoGebra, Dynamic Geometry: Circumcenter and Circumcircle
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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Isogonal Lines.
Theorems and Problems. |
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GeoGebra, Dynamic Geometry:
Orthocenter
of a Triangle.
HTML5 Animation for Tablets (iPad, Nexus..) |
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Semiperimeter, Perimeter Index.
Theorems and Problems. |
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Congruence.
Index.
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Similarity, Ratios, Proportions.
Index.
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Areas Index |
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Classical Theorems
of Triangles.
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Triangle Centers Index. |
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Incenter of a triangle.
Index.
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Excenter.
Index.
Excircle, Exradius.
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Centroid
/Barycenter of a triangle.
Index.
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Circumcenter of a triangle.
Index.
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Orthocenter of a triangle.
Index.
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Circumcircle
Index.
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Orthic Triangle
Index.
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van Lamoen Circle - Index. |
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Dynamic Geometry: Exeter Point
Triangle, Median, Circumcircle, Concurrent Lines, Euler Line, GeoGebra, HTML5 Animation for Tablets.
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