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Recent Additions (Page 73 of 80)






Proposed Problem 28
Right Triangle, altitude, incircles and
inradius. 


Proposed Problem 27
Right Triangle, incircles and inradius. 


Proposed Problem 26
Right Triangle, altitude, incircles and
inradius. 


Today in history:
July 24, 1911
Yale University professor Hiram Bingham discovers Inca city Machu Picchu
in Peru. 


Machu Picchu and the
Bridge Satellite image 


MindMap of Academic
Disciplines 


Vicunas, Inca Gold of the Andes 


MindMap of
Euclid's Elements. A mindmap is an excellent learning tool for
visual communication, organization, content sequencing, and navigation
on Internet. 


Eyeball Theorem:
Animated Angle to Geometry Study. 


Pentagons
& Pentagrams. I found, exploring with dynamic geometry software, new
facts about pentagons and pentagrams. Key concept: Menelaus Theorem.



Pentagons & Pentagrams  Puzzle: 96 triangles. 


Quadrilaterals. Theorems and Problems



Mind Map of Geometry from the Land of the
Incas



Platonic Solids. Interactive animation



Proposed Problem 25
Right Triangle, altitude, incircles and
inradius. 


Proposed Problem 24
Right Triangle, altitude, incircles and
inradii. 


Proposed Problem 23
Right Triangle, altitude, incircles and
inradii. 


Proposed Problem 22
Right Triangle, altitudes, incircles and
inradii. 


Peru opens Caral ruins to tourists
Caral: the oldest civilization in the New
World



Machu Picchu Condor's Eye View



Inca Trail to Machu Picchu Panorama View



Inca Trail to Machu Picchu: Huinay Hayna

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