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Recent Additions (Page 55 of 80)




Proposed Problem 110. Area of
Contact Triangle.


Proposed Problem 109. Angles,
Right Triangle, Cevian.


The Taj Mahal and Golden Rectangles.


Proposed Problem 108. Angles,
Triangle, Median.


Nazca Lines and Indiana Jones
See also: Archaeologists explore Peruvian mystery. University of Bristol


Inca Skull Surgery
Inca Skull Surgeons Were "Highly Skilled," Study Finds.
Trepanation = square hole in the skull.


Proposed Problem 107.Angles,
Triangle. Cevian.


Geometry Projects Brainstorming.


Proposed Problem 106. Angles,
Triangle. Cevian.


Proposed Problem 105.Angles,
Triangle. Interior Point.


Proposed Problem 104. Angles,
Triangle.


The Pythagorean Curiosity Triangles and squares, fifteen conclusions


Proposed Problem 103.Equilateral
Triangle Area, Interior Point, Heron's Formula.


Potato Inca's Food
As Other Staples Soar, Potatoes Break New Ground.


Bandurria is the oldest Peruvian archaeological site, says expert
Bandurria may rival Caral as oldest citadel in Americas.
Satellite View: circular ceremonial center.


Proposed Problem 103.Equilateral
Triangle Area, Interior Point, Heron's Formula.


Proposed Problem 102.Equilateral
Triangle Area, Interior Point.


Proposed Problem 101.Equilateral
Triangle, Pythagorean Theorem, Angles.


Triangle and Squares Theorem 1: with Interactive Geometry Software.
StepbyStep construction, Manipulation, and animation.


Bottema's Theorem: Triangle and Squares with Interactive Geometry
Software.
StepbyStep construction, Manipulation, and animation.


EightPoint Circle Theorem
StepbyStep construction, Manipulation, and animation.


Proposed Problem 100. Circle
Area, Archimedes' Book of Lemmas.


Proposed Problem 99: Circle Area, General Extension to Pythagoras'
Theorem.


Proposed Problem 98.
Quadrilateral Area, Centroid, Similarity.


Complete Quadrilateral: OrtholineSteiner Line.
Using TracenPoche Dynamic Software
StepbyStep construction, Manipulation, and animation


Proposed Problem 97. Similar
Triangles, Areas. 

Proposed Problem 96. Similar
Triangles, Incenters, Parallelogram. 

Proposed Problem 95. Similar
Triangles, Inradii, Parallel. 

Proposed Problem 94. Similar
Triangles, Circumcircles, Circumradii. 

Gergonne's Theorem: Triangle and Concurrent Cevians. 

Proposed Problem 93. Similar
Triangles, Circumcircles, Parallelogram. 

Proposed Problem 92. Similar
Triangles, Circumcircles, Circumradii, Parallel. 

Proposed Problem 91. Similar
Triangles, Altitude, Parallel. 

Proposed Problem 90.
Quadrilateral and Triangle Areas, Midpoints. 

Proposed Problem 89. Triangles of equal area, Midpoints. 
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