surface area and volume

http://www.cimt.plymouth.ac.uk/projects/mepres/book9/bk9i9/bk9_9i4.html
http://www.bbc.co.uk/education/guides/zs3j6sg/revision
http://www.learner.org/interactives/geometry/area_volume.html
http://www.homeschoolmath.net/online/volume_surface_area.php
http://www.learnalberta.ca/content/mejhm/index.html?l=0&ID1=AB.MATH.JR.SHAP&ID2=AB.MATH.JR.SHAP.SURF
http://www.mathplayground.com/index_geometry.html