Plane Geometry: Area of a triangle, Theorems
and Problems - Table of Content - Page 8
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Proposed Problem 85. Contact
Triangles Areas, Incircle, Excircle. |
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Proposed Problem 84. Contact
Triangles Areas, Incircle, Excircle, Inradius, Exradius. |
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Proposed Problem 83. Area of the
Excircle Contact Triangle, exradius, circumradius. |
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De Gua's Theorem
Area of triangles. |
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Triangle and Squares 22
Area of triangles and rectangles.
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Hippocrates and Squaring the Circle
Triangle areas |
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Heron's Formula with medians Triangle
areas. |
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Kurschak's Tile and Theorem.
Jozsef Kurschak (Hungary, 1864-1933) An elegant and a purely geometric
way of finding the area of a regular dodecagon.
Triangle areas. |
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Euclid's Elements
Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book.
Index |
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Varignon and Wittenbauer parallelograms. Quadrilateral: midpoints and
trisection points of the edges. Triangle areas.
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