Plotting coordinate points. http://www.funbrain.com/co/index.html
Finding the area of Composite Figures http://www.learnalberta.ca/content/mejhm/index.html?l=0&ID1=AB.MATH.JR.SHAP&ID2=AB.MATH.JR.SHAP.AREA&lesson=html/object_interactives/composite_figures/use_it.html
Symmetry Artist http://www.mathsisfun.com/geometry/symmetry-artist.html