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Recent Additions (Page 42 of 80)




Proposed Problem 326.
Equilateral triangle, Semicircle, Equal arcs. 

Chan Chan: Sea Otters on the Wall 2.
Trujillo, Peru.


Chan Chan: Wall.
Trujillo, Peru.


Tangential or Circumscribed Quadrilateral


Tangential or Circumscribed Quadrilateral: Pitot Theorem. 

Altitude Index.
Theorems and Problems. 

Six Tangential or Circumscribed Quadrilaterals Theorem. 

Proposed Problem 325.
Isosceles triangle, Altitude, Cevian, Incircle, Excircle. 

Proposed Problem 324.
Quadrilateral with perpendicular diagonals, Concurrence. 

Proposed Problem 323.
Triangle, Incenter, Circumcenter, Equal circles, Collinearity. 

Proposed Problem 322.
Square, Inscribed circle, Tangent, Triangle area. 

Proposed Problem 321.
Triangle, Incenter, Excircle, Midpoint of the Altitude, Collinearity. 

Collinear Points. 

Proposed Problem 320.
Triangle, Circumcircle, Incenter, Excenter, Collinear points. 

Sacred Geometry: Mandala.
Tibetan 'Five Deity Mandala', 17th Century.


Proposed Problem 319.
Triangle, Altitudes, Perpendiculars, Collinear points. 

Proposed Problem 318.
A Scalene triangle, Altitudes, Collinear points. 

Proposed Problem 317.
Right triangle and Inscribed Squares. 

Proposed Problem 316.
Circular segments and Inscribed Squares. 

Geometry Expressions Help.
Interactive Mind Map. 

Proposed Problem 315.
Three Tangent circles, Common external tangent line, Geometric Mean. 

Arithmetic Mean, Geometric Mean, Harmonic Mean, Root Mean Square. 

Proposed Problem 314.
Tangent circles, Common external tangent line, Geometric Mean. 

Proposed Problem 313.
Circle, Chord, Tangent, Perpendicular, Geometric Mean. 

Theseus and the Minotaur Labyrinth. Golden Rectangles.


Geometric Mean. 

Sacred City of CaralSupe, Peru added to UNESCO’s World Heritage
List. 
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