This web site has video clips of Geometric construction. http://www.regentsprep.org/Regents/math/math-topic.cfm?TopicCode=construc
Another web site showing geometric construction. http://www.mathsnet.net/campus/construction/index.html
Shows exampless of the various angles that are congruent (equal) when you have parallel lines. http://www.mathsisfun.com/geometry/parallel-lines.html
Definitions of inductive and deductive reasoning. http://www.andrews.edu/~calkins/math/webtexts/numb05.htm#DEDU
This web site has examples of Pre-Algebra and Algebra problems. http://www.coolmath.com/index.html