These are the notes for Rhombus, Parallelogram, Trapezoid
Source: http://www.schooltube.com/video/307253d4ac1518703d0a/Geo%2011.2%20-%20Area%20of%20Trapezoids,%20Rhombuses,%20Kites
Source: http://www.youtube.com/watch?v=fKCYbP5so40