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 Occurrence of the Conics Real-world examples of occurrences of conic sections: ellipses, parabolas, and hyperbolas. http://britton.disted.camosun.bc.ca/jbconics.htm
 Episodes in the History of Geometry through Models in Dynamic Geometry Utilizing dynamic models to explain different aspects of geometry can be a powerful pedagogical tool. This is exactly what inspired Eduardo Veloso and Rita Bastos to write this classroom exercise for the Mathematical Association of America's "Convergence" site. In this exercise, mathematics educators will receive an introduction to several key aspects of the history of geometry through four... http://www.maa.org/press/periodicals/convergence/episodes-in...
 Triangle Classification This geometry lesson from Illuminations presents the Triangle Classification problem. Students will attempt to classify the triangles formed in a plane when a randomly selected point is connected to the endpoints of a given line segment. Students should have access to a computer with internet access for the lesson. The material is intended for grades 9-12 and should require 1 class period to... http://illuminations.nctm.org/Lesson.aspx?id=2195
 The Geometry Junkyard The Geometry Junkyard website provides a broad introduction to the specifics of geometry. The site, designed by David Eppstein of UC-Irvine, provides all the basics of geometry for students and teachers alike. Topics range from the mathematics of shapes to fractals and multi-dimensional geometry, to name only a few. Also provided are various lesson plans for different levels of education. The... http://www.ics.uci.edu/%7Eeppstein/junkyard/topic.html
 Oliver Byrne's edition of Euclid An unusual and attractive edition of Euclid was published in 1847 in England, edited by an otherwise unknown mathematician named Oliver Byrne. It covers the first 6 books of Euclid, which range through most of elementary plane geometry and the theory of proportions. What distinguishes Byrne's edition is that he attempts to present Euclid's proofs in terms of pictures, using as little text - and... http://www.math.ubc.ca/~cass/Euclid/byrne.html
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