Visualizing Area Formulas

Never memorize an area formula again after you see these simple visual proofs for computing areas of rectangles, paralle... (more)

Never memorize an area formula again after you see these simple visual proofs for computing areas of rectangles, parallelograms, triangles, polygons in general, and circles. Then prove that for two polygons of the same area, you can dissect one into pieces that can be rearranged to form the other. (less)