This is a triangle folding activity.[br][br]A and B are movable points. You can make a fold by dragging point C. Turn off the grid if needed. [br][br]What tasks or questions will you try for exploring properties of a triangle?

How about trying these:[br][list][*]make a fold to:[br][/*][/list] bisect angle A; angle B[br] bisect side BC; AC[br] add the altitude from A; from B[br][list][*]does the angle bisector of A bisect BC? when?[/*][*]show that longer side is opposite to greater angle[/*][*][size=100]cover point A, drag B to make angles B and C almost equal, fold C to B and compare the angles in order to tell which opposite side is longer[/size][br][/*][/list]