Home | Go Geometry Recent Additions (Page 6 of 20)

Above, left: Proposed geometry problem. Right: Butterfly theorem.
 

Welcome! Geometry Step-by-Step from the Land of the Incas provides an eclectic mix of sound, science, and Incan history in order to raise students' interest in Euclidean geometry. Visitors will find geometry problems, proofs, quizzes, puzzles, quotations, visual displays, "scientific speculation", Cuzco, Machu Picchu, Lost City of the Incas, Nazca Lines, the Quipu, the Lord of Sipan, Caral: the oldest civilization in the Americas, and more. Site created and maintained by Antonio Gutierrez.

 

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Recent Additions (Page 6 of 20)

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460.

Sangaku Geometry Theorem: Three circles and a tangent line.

459.

Sangaku Geometry Theorem: Cyclic Quadrilateral. Inradii, Rectangle.

458.

Sangaku Problem (An Old Japanese Theorem). Inradii, Carnot's theorem.

457.

Steve Jobs' Commencement Address at Stanford University.

456.

Selected Video Units

455.

The Incas Index

454.

Yma Sumac an amazing four-octave range. The Castafiore Inca, Gopher Mambo, Machu Picchu, the Secret of the Incas, Tumpa, the Secret of the Incas, Chuncho, the Forest Creatures, Malambo #1, La Pampa y la Puna.

453.

Computer Graphics Animation: The Optiverse and other sphere eversion.

452.

Math for Children: The Triangle by James Blunt. A parody of his popular song You're Beautiful.

451.

Proposed Problem 58: Right Triangle, Congruence, Perpendiculars.

450.

Mathematics Pi and e

Blind Date: Math Pi and e.

449.

Tom Lehrer: Lobachevsky, humorous song.
Lehrer, satirist mathematician and Lobachevsky, founder of non-Euclidean geometry.
That's Mathematics, New Math,
The Elements, Silent E, Who's Next, When You are Old and Gray, Poisoning Pigeons in the Park, Pollution

448.

Transforming Teaching Through Technology 

Transforming Teaching Through Technology. Pay Attention. How we can become a better teacher through technology.
Teaching Teaching and Understanding Understanding

447.

 

Presidential Candidates 2008.

446.

Bathsheba Grossman and Geometry 

Bathsheba Grossman & Geometry. Geometry Art, 3-D, Symmetry and Balance.

445.

Pavel Filonov, Anti cubism

Pavel Filonov & Geometry Anti-Cubism or Analytical Realism.

444.

Euclid's Elements Book XIII, Proposition 10

Euclid's Elements, Book XIII, Proposition 10 One page visual illustration.

443.

Geometry theorems, Mathematics

Mind Map of Theorems 

442.

Inca Empire

Mind Map of the Inca Empire.

441.

Circulo de los nueve puntos, Spanish

Circulo de los Nueve Puntos: Spanish version.

Nine-Point Center, Nine-Point Circle, Euler Line (English version) .
Interactive illustration.

440.

Math in the News

Math in the News 
Algebra, Analysis, AP Calculus, AP Statistics, Applied Mathematics...

439.

Morley's Theorem

Animated illustration of the celebrated Morley's trisector theorem 

438.

Information Technology in 2008

Information Technology: 8 Ways to Boost Your Career in 2008 

437.

Caral Civilization

Caral: the Mother of All Civilizations? 2,627 BC.
Lost Pyramids of Caral 1, 2, 3, 4, 5, 6, 7

436.

Moebius Transformation

Video: Moebius Transformation Revealed.
Translation, dilation, rotation, and inversion to a higher dimension.
Moebius Trip or Mobius Band

435.

Nine-Point Center, Nine-Point Circle, Euler Line.
Interactive illustration.

434.

Mascheroni Construction with compass alone. Midpoint of a segment.

433.

Pythagoras Theorem, 47th Proposition of Euclid's Book I

Pythagorean Theorem, 47th Proposition of Euclid's Book I, Video.

432.

Euclid's Elements 23 definitions

Euclid's Elements Book I, 23 Definitions. One-page visual illustration.
Euclid's Elements Book. Index

431.

Sacred Geometry

Sacred Geometry 

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Last updated: July 21, 2008