
Octagons, Theorems and
Problems 
Index




Geometry Problem 1392. Two Cyclic Quadrilateral, Cyclic Octagon, Circle. 

Geometry Problem 1325.
Octagons, Midpoints, Squares, Mobile Apps, iPad. 

Octagon Kaleidoscope, iPad Apps, Mobile.


Geometric Art: Isolines, Regular Polygons, Square, Octagon, Hexadecagon, Parallel Lines, Symmetry, Software 

Problem
583.
Quadrilateral, Diagonals, Circumcenters, Parallelogram, Octagon, Areas. 

Geometric Art: Isolines, Polygons, Rhombus, Triangle, Octagon, Parallel Lines, Symmetry, Geometry for Kids,
Sacred Geometry, Software 

Octagon Word Cloud.
Geometry for Kids. 

Proposed Problem 287: Regular Octagon. 

Proposed Problem 286: Square, Midpoints, Octagon. 

Octagon for Children. Video.


Proposed Problem 161.
Parallelogram, Midpoints, Octagon, Areas.


Proposed Problem 225. Viviani's Theorem Extension, Regular Polygon,
Apothem, Distance. 

Stonehenge builders had geometry skills to rival Pythagoras.
Five years of detailed research, carried out by the Oxford University
landscape archaeologist Anthony Johnson, claims that Stonehenge was
designed and built using advanced geometry. "The surveyors started by
using a rope to create a circle, then laid out the four corners of a
square on its circumference, before laying out a second similar square,
thus creating an inner octagon..."


Nazca Lines and Crop Circles


Looted Peru Moche
Headdress Recovered in London
Octagon: Feline sea god with
octopuslike tentacles 

Euclid's Elements
Book I, 23 Definitions. Onepage visual illustration.
Euclid's Elements Book.
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by Antonio Gutierrez
Last updated: Oct 5, 2018
