Helpful Websites:

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

http://www.learningwave.com/lwonline/geometry_section2/trapezoid/trapezoid1.html

http://www.math.com/school/subject3/lessons/S3U2L3GL.html

http://www.shodor.org/interactivate/discussions/trapezoid.html

http://www.mathgoodies.com/lessons/vol1/area_trapezoid.html

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