Friday, April 30, 2010

Problem 444: Tangent circles, Secant line, Chords, Angles, Congruence

Geometry Problem
Click the figure below to see the complete problem 444 about Internally Tangent circles, Secant line, Chords, Angles, Congruence.

Problem 444: Internally Tangent circles, Secant line, Chords, Angles, Congruence
See also:
Complete Problem 444

Level: High School, SAT Prep, College geometry

Problem 443: Intersecting Circles, Common Chord, Secant line, Tangent line, Angles

Geometry Problem
Click the figure below to see the complete problem 443 about Overlapping, Intersecting Circles, Common Chord, Secant line, Tangent line, Angles.

Problem 443: Overlapping, Intersecting Circles, Common Chord, Secant line, Tangent line, Angles
See also:
Complete Problem 443

Level: High School, SAT Prep, College geometry

Problem 442: Triangle, Median, Cevian, Transversal, Congruent Angles

Geometry Problem
Click the figure below to see the complete problem 442 about Triangle, Median, Cevian, Transversal, Congruent Angles.

Problem 442: Triangle, Median, Cevian, Transversal, Congruent Angles.
See also:
Complete Problem 442

Level: High School, SAT Prep, College geometry

Thursday, April 29, 2010

Problem 441: Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity

Geometry Problem
Click the figure below to see the complete problem 441 about Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity.

Problem Problem 441: Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity.
See also:
Complete Problem 441

Level: High School, SAT Prep, College geometry

Wednesday, April 28, 2010

Problem 440: Triangle, Incircle, Incenter, Angle Bisector, Tangency Points, Circle, Angles

Proposed Problem
Click the figure below to see the complete problem 440 about Triangle, Incircle, Incenter, Angle Bisector, Tangency Points, Circle, Angles.

Problem 440: Triangle, Incircle, Incenter, Angle Bisector, Tangency Points, Circle, Angles
See also:
Complete Problem 440

Level: High School, SAT Prep, College geometry

Tuesday, April 27, 2010

Marion Walter's Theorem Index

Marion Walter's Theorem, Triangle, Trisection of Sides, Hexagon, Areas, and Related Topics

Click the figure below to see the index.

Marion Walter's Theorem Index

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Marion Walter's Theorem Index

Van Hiele Model Index

In mathematics education, the Van Hiele model is a theory that describes how students learn geometry.

Click the figure below to see the index.

Van Hiele Model Index.

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Van Hiele Model Index

Van Hiele Model Word Cloud

Weighted list in visual design.
Click the figure below to see the most popular words in Van Hiele Model.

Van Hiele Model Word Cloud.

Read more at:
Van Hiele Model Word Cloud

Sunday, April 25, 2010

Problem 439: Isosceles triangle, Cevian, Incenter, Angles, Circle

Proposed Problem
Click the figure below to see the complete problem 439 about Isosceles triangle, Cevian, Incenter, Angles, Circle.

Problem 439: Isosceles triangle, Cevian, Incenter, Angles, Circle.
See also:
Complete Problem 439

Level: High School, SAT Prep, College geometry

Problem 438: Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Parallel lines

Proposed Problem
Click the figure below to see the complete problem 438 about Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement, Parallel lines.

Problem 438.<br />Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement, Parallel.
See also:
Complete Problem 438

Level: High School, SAT Prep, College geometry

Problem 437: Tangent Circles, Diameter, Chord, Perpendicular, Congruence

Proposed Problem
Click the figure below to see the complete problem 437 about Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement.

Problem 437.<br />Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement.
See also:
Complete Problem 437

Level: High School, SAT Prep, College geometry

Friday, April 23, 2010

Problem 436: Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement.

Proposed Problem
Click the figure below to see the complete problem 436 about Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement.

Problem 436.<br />Tangent Circles, Diameter, Chord, Perpendicular, Congruence, Measurement.
See also:
Complete Problem 436

Level: High School, SAT Prep, College geometry

Thursday, April 22, 2010

Philadelphia, SEPTA and Golden Rectangle

Southeastern Pennsylvania Transportation Authority (SEPTA) has the 6th-largest U.S. transit system by ridership, with about 306.9 million annual unlinked trips.
Click the figure below to see the illustration.

Philadelphia,
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Philadelphia, SEPTA: Southeastern Pennsylvania Transportation Authority.

The Landscape of Geometry Terms, Brainstorming

The Landscape of Geometry terms is a random scenery of terms about Geometry, than can be seen in a single view. This word storming (brainstorming) is a mental exercise for producing ideas by right brain thinking (random, visual, subjective, emotional, holistic, intuitive, creative, divergent).
Click the figure below to see the interactive illustration.

The Landscape of Geometry Terms
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The Landscape of Geometry Terms

Monday, April 19, 2010

Problem 690: Distance between the Incenter and the Centroid of a Triangle

Proposed Problem
Prove that the distance between the incenter I and the centroid G of a triangle ABC is:
Click the figure below to see the complete illustration.

Problem 435: Triangle, Incircle, Inradius, Congruent circles, tangent, Measurement.
See also:
Distance between the Incenter and the Centroid
Level: High School, SAT Prep, College geometry

Sunday, April 18, 2010

Distances between Triangle Centers

Index
Click the figure below to see the Distances between Triangle Centers Index

 Geometric Mean, Theorems and Problems.
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Distances between Triangle Centers
Level: High School, SAT Prep, College geometry

Problem 435: Triangle, Incircle, Inradius, Congruent circles, Tangent, Measurement

Proposed Problem
Click the figure below to see the complete problem 435 about Triangle, Incircle, Inradius, Congruent circles, Tangent, Measurement, Similarity.

Problem 435: Triangle, Incircle, Inradius, Congruent circles, tangent, Measurement.
See also:
Complete Problem 435

Level: High School, SAT Prep, College geometry

"Lima morning" by Alfredo Deza

Unnoticed street life in Peru's capital city, La Victoria and Villa Maria del Triunfo.

Click the figure below to see the preview of the book.

Lima morning by Alfredo Deza
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Lima morning by Alfredo Deza

Friday, April 16, 2010

Earthquake: Subduction Zone Geometry Analysis

Preliminary SZGC Results NEAR COAST OF CENTRAL CHILE by Dr. G. Hayes, NEIC.
Click the figure below to see the illustration.

Earthquake:
Continue reading at:
Earthquake: Subduction Zone Geometry Analysis

Thursday, April 15, 2010

Numbers, Geometry, Fibonacci Spiral, and Golden Rectangles

Video
A video inspired on numbers, geometry and nature by Cristobal Vila.
Click the figure below to see the video.

Numbers, Geometry, Fibonacci Spiral, and Golden Rectangles
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Numbers, Geometry, Fibonacci Spiral, and Golden Rectangles

Problem 434: Quadrilateral, Transversal, Ratio, Measurement, Similarity

Proposed Problem
Click the figure below to see the complete problem 434 about Quadrilateral, Transversal, Ratio, Measurement, Similarity.

Problem 433: Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity.
See also:
Complete Problem 434

Level: High School, SAT Prep, College geometry

Monday, April 5, 2010

Unvarnished web site mindmap and brainstorming

Unvarnished web site is an online resource for building, managing, and researching professional reputation, using community-contributed, professional reviews.

Unvarnished, Interactive Mind Map is based on Google’s Wonder Wheel for mind mapping, brainstorming, studying trends, and idea generation.

Graphic organizers are visual representations of knowledge, concepts or ideas.
Click the figure below to see the Interactive Mind Map.

 Unvarnished web site mindmap.
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Unvarnished web site Mind Map

Sunday, April 4, 2010

Problem 433: Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity

Proposed Problem
Click the figure below to see the complete problem 433 about Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity.

Problem 433: Quadrilateral, Triangle, Area, Proportion, Measurement, Similarity.
See also:
Complete Problem 433

Level: High School, SAT Prep, College geometry

Problem 432: Trapezoid, Parallel, Measurement, Similarity, Transversal

Proposed Problem
Click the figure below to see the complete problem 432 about Trapezoid, Parallel, Measurement, Similarity, Transversal.

Problem 432: Trapezoid, Parallel, Measurement, Similarity, Transversal.
See also:
Complete Problem 432

Level: High School, SAT Prep, College geometry

Thursday, April 1, 2010

Problem 431: Quadrilateral, Midpoints of Diagonals, Transversal

Proposed Problem
Click the figure below to see the complete problem 431 about Quadrilateral, Midpoints of Diagonals, Transversal, Similarity.

Problem 431: Quadrilateral, Midpoints of Diagonals, Transversal.
See also:
Complete Problem 431

Level: High School, SAT Prep, College geometry