Friday, September 30, 2011

Problem 674: Triangle, Altitude, Angles

Geometry Problem
Level: Mathematics Education, High School, Honors Geometry, College.
This entry contributed by Alejandro Astudillo.

Click the figure below to see the complete problem 674.

Online Geometry Problem 674: Triangle, Altitude, Angles

Friday, September 23, 2011

Problem 673: Internally tangent circles, Chord, Tangent, Metric Relations

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

Click the figure below to see the complete problem 673.

Online Geometry Problem 673: Internally tangent circles, Chord, Tangent, Metric Relations.

Problem 672: Internally tangent circles, Chord, Tangent, Geometric Mean

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

Click the figure below to see the complete problem 672.

Online Geometry Problem 672: Internally tangent circles, Chord, Tangent, Geometric Mean.

Thursday, September 22, 2011

Problem 671: Triangle, Cevian, Angles, Congruence

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

Click the figure below to see the complete problem 671.

Online Geometry Problem 671: Triangle, Cevian, Angles, Congruence

Sunday, September 18, 2011

Madonna of the Goldfinch by Raphael and Golden Rectangles

John the Baptist offers the goldfinch to Christ in warning of his future.

Click the figure below to see the interactive illustration.

 Madonna of the Goldfinch by Raphael and Golden Rectangles.

Madonna of the Goldfinch by Raphael and Golden Rectangles

Click the figure below to see the interactive illustration.

 Madonna of the Goldfinch by Raphael and Golden Rectangles.

Saturday, September 17, 2011

#Geometry Problem 670: Triangle, 60 Degrees, Orthocenter, Incenter, Circumcenter, Congruence

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

Click the figure below to see the complete problem 670.

Online Geometry Problem 670: Triangle, 60 Degrees, Orthocenter, Incenter, Circumcenter, Congruence

Tuesday, September 13, 2011

Geometry Problem 669: Triangle, Circumcircle, Incenter, Midpoint, Collinear points, Mind Map

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

Click the figure below to see the complete problem 669.

 Problem 669: Triangle, Circumcircle, Incenter, Midpoint, Collinear points, Mind Map.

Sunday, September 11, 2011

Problem 668: Right triangle, Incircles, Parallel, Common Tangent, Mind Map

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

Click the figure below to see the complete problem 668.

 Problem 668: Right triangle, Incircles, Parallel, Common Tangent, Mind Map.

Friday, September 9, 2011

Problem 667: Intersecting Circles, Secant, Tangent, Metric Relations, Mind Map

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

Click the figure below to see the complete problem 667.

 Problem 667: Intersecting Circles, Secant, Tangent, Metric Relations, Mind Map.

Problem 666: Intersecting Circles, Secant, Tangent, Concyclic points, Mind Map

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

Click the figure below to see the complete problem 666.

 Problem 665: Intersecting Circles, Secant, Tangent, Angles, Mind Map.

Wednesday, September 7, 2011

QS World University Rankings 2011/2012 by Faculty, Interactive Mind Map

Cambridge tops list of world's best universities (September 2011).

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

 QS World University Rankings 2011/2012 by Faculty, Interactive Mind Map.

Problem 665: Intersecting Circles, Secant, Tangent, Angles, Mind Map

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

Click the figure below to see the complete problem 665.

 Problem 665: Intersecting Circles, Secant, Tangent, Angles, Mind Map.

Friday, September 2, 2011

Problem 664. Triangle, 60 Degrees, Orthocenter, Incenter, Circumcenter, Angles

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

Click the figure below to see the complete problem 664.

 Online Geometry Problem 664. Triangle, 60 Degrees, Orthocenter, Incenter, Circumcenter, Angles.

Problem 663. Scalene Triangle, 60 Degrees, Altitude, Angle Bisector, Perpendicular Bisector

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

Click the figure below to see the complete problem 663.

 Online Geometry Problem 663. Scalene Triangle, 60 Degrees, Altitude, Angle Bisector, Perpendicular Bisector, Concurrent lines.