Trapezoid Websites:
emathlab.com
eMathLab - Math Help - Math Skills - Math Practice
Math skills practice site. Basic math, GED, algebra, geometry, statistics, trigonometry and calculus practice problems are available with instant feedback.
gourd.com
Welcome to Gourd Music: Part folk, part classical, all acoustic music.
With various ensembles of guitar, cello, harp, flute, oboe, fiddle, mandolin, mountain and hammered dulcimer, banjo, and more: from Shaker, Americana, Victorian Christmas...