Helpful Websites:

http://math.rice.edu/~lanius/Geom/def.html

 http://www.math.com/school/subject3/lessons/S3U3L4GL.html

http://mathworld.wolfram.com/Triangle.html

http://mathworld.wolfram.com/RightTriangle.html

http://www.math.com/school/subject3/lessons/S3U3L4DP.html

http://www.msnbc.msn.com/id/5215478/

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