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The Pythagorean Curiosity |
Problem
103.Equilateral Triangle Area,
Interior Point, Heron's Formula. |
Triangle and Squares Theorem 1:
with Interactive Geometry Software |
Problem
102.Equilateral Triangle Area,
Interior Point
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Complete Quadrilateral: Ortholine-Steiner Line |
Problem
97. Similar Triangles, Areas. |
Problem
97. Similar Triangles, Areas. |
Problem 96. Similar Triangles, Incenters,
Parallelogram
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Complete Quadrilateral: Ortholine-Steiner Line |
Problem
95. Similar Triangles, Inradii,
Parallel.. |
Problem
94. Similar Triangles, Circumcircles,
Circumradii. |
Problem 93. Similar Triangles, Circumcircles, Parallelogram.
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Gergonne's Theorem: Triangle and Concurrent Cevians
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Problem 90. Quadrilateral and Triangle
Areas, Midpoints |
Problem 89. Triangles of equal area, Midpoints |
Problem 87. Quadrilaterals and
Midpoints of Diagonals
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Intouch and Extouch
Triangles, Areas
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Contact Triangles Areas, Incircle, Excircle |
Contact Triangles Areas, Incircle, Excircle, Inradius, Exradius |
Area of the Contact Triangle, inradius, circumradius
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English version
Spanish version |
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Mascheroni
Construction with compass alone. |
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Right
Triangles, Formulas and Facts
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Mind Map of
the Pythagorean Theorem
Proofs by shears, translation, similarity. Facts. |
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Triangle and Squares 20
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