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Octagons, Theorems and
Problems -
Index
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![Geometry Problem 1494](../school-college/5/p1494-parallelogram-midpoints-octagon-area-1.jpg) |
Geometry
Problem 1494.
Parallelogram, Midpoints, Octagon, Areas. |
![Problem 1430](../school-college/5/p1430-regular-octagon-area-1.jpg) |
Geometry Problem 1430. Regular Octagon, Area, Equivalent Figures,
Poster, Conformal Mapping. |
![Problem 1392](../school-college/4/p1392-cyclic-quadrilateral-circle-tutor-1.jpg) |
Geometry Problem 1392. Two Cyclic Quadrilateral, Cyclic Octagon, Circle. |
![Geometry problem 1325](../school-college/4/p1325-octagon-midpoint-square-math-education-1.jpg) |
Geometry Problem 1325.
Octagons, Midpoints, Squares, Mobile Apps, iPad. |
![Octagon Kaleidoscope](../geometric_art/mobile-apps/geometric-art-kaleidoscope-octagon-tile-background-ipad-apps-sw-1.jpg) |
Octagon Kaleidoscope, iPad Apps, Mobile.
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![Isolines illustration: Regular polygons](../software/isoline/geometric-art-isoline-regular-polygon-square-symmetry-software-1.jpg) |
Geometric Art: Isolines, Regular Polygons, Square, Octagon, Hexadecagon, Parallel Lines, Symmetry, Software |
![Quadrilateral, Circumcenters](../problem/p583_quadrilateral_circle_1.jpg) |
Problem
583.
Quadrilateral, Diagonals, Circumcenters, Parallelogram, Octagon, Areas. |
![Isolines illustration: Pentagon](../software/isoline/geometric-art-isoline-rhombus-polygon-symmetry-software-1.jpg) |
Geometric Art: Isolines, Polygons, Rhombus, Triangle, Octagon, Parallel Lines, Symmetry, Geometry for Kids,
Sacred Geometry, Software |
![Octagon Word Cloud](../software/word-cloud/octagon-word-cloud-mobile-apps-1.jpg) |
Octagon Word Cloud.
Geometry for Kids. |
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Proposed Problem 287: Regular Octagon. |
![Octagon, Square](../problem/p286_square_octagon_17.jpg) |
Proposed Problem 286: Square, Midpoints, Octagon. |
![Octagon for children](octagon_children_17.jpg) |
Octagon for Children. Video.
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![Elearning 161 Parallelogram and Octagon Areas](../problem/p161_parallelogram_area_17.jpg) |
Proposed Problem 161.
Parallelogram, Midpoints, Octagon, Areas.
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![Viviani theorem extension, regular polygon](http://gogeometry.com/
problem/p225_viviani_theorem_17.jpg) |
Proposed Problem 225. Viviani's Theorem Extension, Regular Polygon,
Apothem, Distance. |
![Stonehenge and Golden Rectangle](../wonder_world/stonehenge_golden_rectangle_17.jpg) |
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..."
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![Nazca Lines and Crop Circles](../incas/video_nazca_lines_crop_17.jpg) |
Nazca Lines and Crop Circles
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![](../incas/inca_headdress_moche_170.jpg) |
Looted Peru Moche
Headdress Recovered in London
Octagon: Feline sea god with
octopus-like tentacles |
![Euclid's Elements 23 definitions](euclid_elements_definition_170.jpg) |
Euclid's Elements
Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book.
Index |
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by Antonio Gutierrez
Last updated:
Nov 2, 2021
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