Area of Triangles

Here is a video on lesson to learn the Area of Triangles:
1) http://www.mathplayground.com/howto_area_triangle.html

Games on Area of Triangles:
1) http://www.factmonster.com/math/knowledgebox/player.html?movie=sfw41510

2) http://www.mangahigh.com/en/maths_games/shape/length_area_and_volume/area_of_a_triangle?localeset=en

More videos on lessons to learn the Area of Triangles: 

1) http://www.youtube.com/watch?v=GWbs4BJt4G0

2) http://www.youtube.com/watch?v=pO0akNdQlnI

3) http://www.youtube.com/watch?v=G_1zNkKtN04

4) http://www.youtube.com/watch?v=JELi4P7HDQU&feature=fvwp&NR=1

5) http://www.youtube.com/watch?NR=1&v=jciK_KJ1HIc&feature=endscreen