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Quadrilaterals: Table of
Content (Page 3 of 4)
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Proposed Problem 151.
Quadrilateral, Area, Trisection of Sides.
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Machu Picchu and Golden Rectangle.
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Chichen Itza and Golden Rectangle.
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Christ the Redeemer and Golden Rectangle.
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Colosseum and Golden Rectangle.
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Petra and Golden Rectangle.
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Proposed Problem 150.
Quadrilateral, Area, Trisection of Sides.
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Proposed Problem 149.
Quadrilateral, Area, Midpoints.
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Proposed Problem 148.
Quadrilateral, Area, Midpoints.
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Proposed Problem 147.
Quadrilateral, Area, Midpoints, Triangle.
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Proposed Problem 146. Varignon's
Theorem: Quadrilateral, Midpoints, Parallelogram, Area, Perimeter. |
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Proposed Problem 139. Triangle
Area, Orthic Triangle, Semiperimeter, Circumradius. |
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Proposed Problem 137.
Orthic Triangle, Altitudes, Perpendicular, Incircle, Collinear Points,
Parallelogram. |
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Trapezoid, Triangle, Diagonals, Midpoints.
Dynamic Geometry.
Step-by-Step construction, Manipulation, and animation.
Prove proposition. |
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Four Circles Theorem Using Interactive Dynamic Software
Step-by-Step construction, Manipulation, and animation.
Cyclic Quadrilateral. |
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The significance of the Pythagorean theorem by Jacob
Bronowski.
Pythagorean Theorem, 47th Proposition of Euclid's Book I. |
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The Pythagorean Curiosity
Triangles and squares, fifteen conclusions |
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Inca Skull Surgery
Inca Skull Surgeons Were "Highly Skilled," Study Finds.
Trepanation = square hole in the skull. |
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Triangle and Squares Theorem 1: with Interactive Geometry
Software
Step-by-Step construction, Manipulation, and animation. |
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Bottema's Theorem: Triangle and Squares with Interactive
Geometry Software
Step-by-Step construction, Manipulation, and animation. |
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Eight-Point Circle Theorem
Step-by-Step construction, Manipulation, and animation. |
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Complete Quadrilateral: Ortholine-Steiner Line.
Using TracenPoche Dynamic Software
Step-by-Step construction, Manipulation, and animation |
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Parallelogram Problem 96. Similar
Triangles, Incenters, Parallelogram. |
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Parallelogram Problem 93. Similar
Triangles, Circumcircles, Parallelogram. |
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Proposed Problem 90.
Quadrilateral and Triangle Areas, Midpoints.
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Proposed Problem 88. Triangle and Quadrilateral Areas, Midpoints.
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Proposed Problem 87. Area of
Quadrilaterals and Midpoints of Diagonals.
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Complete quadrilateral
Newton's Theorem, Newton-Gauss Line: Complete quadrilateral theorem.
Using TracenPoche Dynamic Geometry Software,
Online Step-by-Step construction, manipulation, and animation. |
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Cyclic quadrilateral
Proposed Problem 78: Angles of a Circle.
Perpendicular and parallel lines, Midpoint, Diameter, Chord, Cyclic
quadrilateral, Congruence.
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Cyclic quadrilateral
Proposed Problem 77: Angles of a Circle.
Parallel lines, Cyclic quadrilateral.
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