Obtuse Triangle Theorems and
Problems - Table of Content
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Euclid's Elements
Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book.
Index |
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Euclid's Elements Book II, Proposition 12: Law of Cosines.
Obtuse triangle. |
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Feuerbach Theorem, Obtuse Triangle illustration.
Obtuse triangle. |
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The Pythagorean Curiosity
Triangles and squares, fifteen conclusions.
Several obtuse triangles. |
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Geometry Problem
1033.
Triangle, Angle Obtuse, Circumcircle, Diameter, Area. |
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Proposed Problem 368.
Obtuse Triangle, 120 degrees, Angle bisectors, Perpendicular. |
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Proposed Problem 364.
Obtuse triangle, Congruence, Circles, Diameter, Curvilinear triangle,
Area. |
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Proposed Problem 322.
Square, Inscribed circle, Tangent, Triangle area.
Obtuse triangle. |
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Proposed Problem 304.
Triangle, Angle bisector of 120 degrees. Obtuse triangle. |
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Proposed Problem 212. 120 Degree Triangle, Equilateral triangles,
Areas.
Obtuse triangle. |
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Proposed Problem 199. Triangle, Quadrilateral, Angles.
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Proposed Problem 112. Area of
square and obtuse triangle.
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Problem 47.
Obtuse Triangle, median, and angles. |
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Problem 46. Obtuse
Triangle, median, and angles. |
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Problem 14. Obtuse
Triangle, median, and angles. |
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Problem
1. Obtuse Triangle, median and angles. |