Thursday, June 30, 2011

Problem 630: Clawson Point: Orthic Triangle, Extangents Triangle, Homothecy

Click the figure below to view the Clawson Point.

 Clawson Point: Orthic Triangle, Extangents Triangle, Homothecy.
Zoom at: Clawson Point
Level: High School, SAT Prep, College geometry

Puzzle based on the Clawson Point, Geometry for Kids, Triangle Centers

Interactive Puzzle
Click the figure to solve the interactive puzzle about the Clawson Point: Circumcenters, Concurrent lines


Puzzle based on the Clawson Point, Geometry for Kids, Triangle Centers.
Zoom at Puzzle: Clawson Point

Wednesday, June 29, 2011

iPad Apps: iCrosss, 3D Polyhedron - Video

Application supports such kinds of polyhedra as regular polyhedra (Platonic solids), Pyramids, Prisms, Anti-prisms and Archimedean solids and duals.

Click the figure below to see the video demo.

iPad Apps: iCrosss, 3D Polyhedron - Video.

iPad Apps: Bubble Harp, Geometry for Kids - Video

Bubble Harp was built for the iPhone and iPad with the help of openFrameworks and a Triangle Mesh Generator.
Click the figure below to see the video demo.

iPad Apps: Bubble Harp, Geometry for Kids - Video.

iPad, iPhone Apps: Math Shapes, Geometry for Kids - Video

Covers Pre-K, Kindergarten, and Grade 1 geometry.
Click the figure below to see the video demo.

Triangle Circumcenter by Folding - Software: Tabula.

Sunday, June 26, 2011

Triangle Circumcenter by Folding - Software: Tabula

The art of origami or paper folding has received a considerable amount of mathematical study.
Click the figure below to see the video.

Triangle Circumcenter by Folding - Software: Tabula.

Software: Tabula, Triangle Centroid by Folding

The art of origami or paper folding has received a considerable amount of mathematical study.
Click the figure below to see the video.

Triangle Centroid by Folding - Software: Tabula.

Software: Tabula, Triangle Orthocenter by Folding

The art of origami or paper folding has received a considerable amount of mathematical study.
Click the figure below to see the video.

Triangle Orthocenter by Folding - Software: Tabula.

Saturday, June 25, 2011

Triangle Incenter by Folding - Software: Tabula

The art of origami or paper folding has received a considerable amount of mathematical study.
Click the figure below to see the video.

Triangle Incenter by Folding - Software: Tabula.

Friday, June 24, 2011

Sangaku Japanese Geometry Problems

Click the figure below to see the visual index of Sangaku problems.

Sangaku Japanese Geometry Problems


Level: High School, SAT Prep, College geometry

Geometry in Toronto, Ontario - Slideshow

Click the figure below to see the slideshow.

Geometry in the Real World, Toronto, Ontario - Slideshow

Thursday, June 23, 2011

Sol LeWitt: 2D+3D, Walker Art Center 2010 - Video and News

Walker Art Center's Sol LeWitt: 2D+3D Features
Groundbreaking Sculptural and Two-Dimensional Works.
Click the figure below to see the video and news.

Walker Art Center's Sol LeWitt: 2D+3D Features Groundbreaking Sculptural and Two-Dimensional Works.

Sol LeWitt Interview, New York, 2004 - Video and News

This clip is part of an interview with Sol LeWitt conducted by Stefan Römer. 10/2/2004, New York City.
Click the figure below to see the video and news.

Sol LeWitt Interview, New York, 2004 - Video and News.

Problem 629: Triangle, Perpendicular to Sides, Intersecting Lines, Altitude

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 629.

Online Geometry Problem 629: Triangle, Perpendicular to Sides, Intersecting Lines, Altitude.

Problem 628: Cyclic Quadrilateral, Congruence, Parallel Lines

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 628.

 Online Geometry Problem 628: Cyclic Quadrilateral, Congruence, Parallel Lines.

Wednesday, June 22, 2011

Billiard and Geometry - Video and News

Geometry and physics are essential parts of the game of pool/billiards.
Click the figure below to see the video and news.

Geometry and physics are essential parts of the game of pool/billiards.

Problem 627: Cyclic Quadrilateral, Congruence, Concyclic Points

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 627.

 Problem 627: Cyclic Quadrilateral, Congruence, Concyclic Points.

Monday, June 20, 2011

Problem 626: Triangle, Distance from the Incenter to an Excenter

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 626.

 Online Geometry Problem 626: Triangle, Distance from the Incenter to an Excenter.

Sunday, June 19, 2011

McArthur River Uranium Mine, Saskatchewan, Canada, Map and News

McArthur River is the world's largest high-grade uranium mine.

Click the figure below to see the geometry of McArthur River Uranium Mine, interactive satellite map and news.

McArthur River Uranium Mine, Saskatchewan, Canada, Map and NewsZoom at: McArthur River Uranium Mine.

Uranium Mining Operations in the World

Click the figure below to see the index.

Uranium Mining Operations in the World - IndexZoom at: Uranium Mining .

Namibia Rossing Uranium Mine, Map and News

Rossing is the world's longest running open pit uranium mine and the third largest producer of uranium oxide globally.

Click the figure below to see the geometry of Rossing Uranium Mine, interactive satellite map and news.

Namibia Rossing Uranium Mine, Map and NewsZoom at: Rossing Uranium Mine.

Kumtor Gold Mine Kyrgyz Republic, Map and News

Located in Tian Shan mountains at more than 4,000 m (14,000 ft) above sea level, Kumtor is the second-highest gold mining operation in the world after Yanacocha gold mine in Peru.

Click the figure below to see the interactive satellite map and news.

Kumtor Gold Mine in Kyrgyz Republic, Map and NewsZoom at: Kumtor Gold Mine.

Saturday, June 18, 2011

Problem 625: Triangle, Parallel Lines, Congruence, Angle Bisector

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 625.

 Online Geometry Problem 625: Triangle, Parallel Lines, Congruence, Angle Bisector.

Thursday, June 16, 2011

Problem 624: Triangle, Incenter, Excenter, Incircle, Excircle, Similarity

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 624.

 Online Geometry Problem 624: Triangle, Incenter, Excenter, Incircle, Excircle, Similarity.

Problem 623: Triangle, Incenter, Excenter, Incircle, Excircle, Concyclic Points

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 623.

 Online Geometry Problem 623: Triangle, Incenter, Excenter, Incircle, Excircle, Concyclic Points.

Monday, June 13, 2011

Rio Tinto Borax Mine in Boron, California, Map and News

One of the richest borate deposits on the planet.
Click the figure below to see the interactive satellite map and news.

Rio Tinto Borax Mine in Boron, California, Map and News.Zoom at: Borax Mine Boron, California.

Mining Operations in the World: Rio Tinto - Index

Rio Tinto is a leading international mining group, combining Rio Tinto plc and Rio Tinto Limited.
Click the figure below to see the index.

Mining Operations in the World: Rio Tinto - IndexZoom at: Mining Operations: Rio Tinto.

Sunday, June 12, 2011

Problem 622: Intersecting Circles, Concyclic Points, Centers, Radii

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 622.

 Online Geometry Problem 622: Intersecting Circles, Concyclic Points, Centers, Radii.

Saturday, June 11, 2011

Online Geometry Problem 621: Two Parallelograms, Diagonals, Centers, Parallel Lines

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 621.

 Online Geometry Problem 621: Two Parallelograms, Diagonals, Centers, Parallel Lines.

Area de las Figuras Planas: Teoremas y Problemas, English ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de area de las figuras planas.

Área de las Figuras Planas: Teoremas y Problemas.

Circunferencia Exinscrita: Teoremas y Problemas, English ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de la circunferencia exinscrita del triangulo.

Circunferencia Exinscrita: Teoremas y Problemas.

Incentro del Triangulo, Teoremas y Problemas, English ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del incentro del triangulo.

Incentro del Triangulo, Teoremas y Problemas.

Circunferencia, Circulo, Teoremas y Problemas, English ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de la circunferencia y circulo.

Circunferencia, Circulo, Teoremas y Problemas

Cuadrado: Teoremas y Problemas, English ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del cuadrado.

Cuadrado: Teoremas y Problemas

Triangulo Escaleno: Teoremas y Problemas, English ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del triangulo escaleno.

Triangulo Escaleno: Teoremas y Problemas

Triangulo Equilatero: Teoremas y Problemas, ESL

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del triangulo equilatero.

Triángulo Equilátero: Teoremas y Problemas

Triangulo Isosceles: Teoremas y Problemas

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del triangulo isosceles.

Triángulos Rectángulos: Teoremas y Problemas

Triangulo Rectangulo: Teoremas y Problemas

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice del triangulo rectangulo.

Triángulos Rectángulos: Teoremas y Problemas

Mediana del Triangulo: Teoremas y Problemas

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de triangulos.

Mediana del Triangulo, Teoremas y Problemas

Altura del Triangulo, Teoremas y Problemas

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de triangulos.

Altura del Triangulo, Teoremas y Problemas

Triangulos: Teoremas y Problemas

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de triangulos.

Triángulos: Teoremas y Problemas

Problemas de Geometría

Spanish-language version
Version en español.
Nivel: Educacion Secundaria, Academia, Preparatoria, Bachillerato, College.

Hacer click en la figura para ver el indice de problemas en espanol.

Problemas de Geometría

Geometría: Teoremas y Problemas

Spanish-language version
Version en español.

Hacer click en la figura para ver el indice.

Geometría: Teoremas y Problemas

Online Geometry Problem 620: Three Rectangles, Diagonals, Centers, Angles

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 620.

 Online Geometry Problem 620: Three Rectangles, Diagonals, Centers, Angles

Thursday, June 9, 2011

Problem 619: Triangle Area, 30 Degrees, Incircle, Incenter, Tangent

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 619.

 Problem 619: Triangle Area, 30 Degrees, Incircle, Incenter, Tangent

Problem 618: Triangle Area, 60 Degrees, Incircle, Incenter, Tangent

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 618.

 Problem 618: Triangle Area, 60 Degrees, Incircle, Incenter, Tangent

Problem 617: Right Triangle Area, Incircle, Incenter, Tangent, 90 Degrees

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.

Click the figure below to see the complete problem 617.

Problem 617: Right Triangle Area, Incircle, Incenter, Tangent, 90 Degrees

Problem 616: Parallelogram, Diagonals, Intersecting Lines, Parallel Lines

Geometry Problem
Level: Mathematics Education, High School, College.

Click the figure below to see the complete problem 616.

Problem 616: Parallelogram, Diagonals, Intersecting Lines, Parallel Lines

Tuesday, June 7, 2011

Problem 615: Right Triangle with a Square, Diagonals, Center, Area of Quadrilateral

Geometry Problem
Level: Mathematics Education, High School, College.

Click the figure below to see the complete problem 615.

Problem 615: Right Triangle with a Square, Diagonals, Center, Area of Quadrilateral

Monday, June 6, 2011

Problem 614: Parallelogram, Diagonals, Intersecting Lines, Parallel Lines

Geometry Problem
Level: Mathematics Education, High School, College.

Click the figure below to see the complete problem 614.

Problem 614: Parallelogram, Diagonals, Intersecting Lines, Parallel Lines