Piano-Hinged Dissection of an Ellipse to a Heart
This Demonstration shows a rounded piano-hinged dissection of an ellipse to a heart.
This Demonstration follows the instructions in . The red and blue figures should be considered as a double layer.
 G. N. Frederickson, Piano-Hinged Dissections: Time to Fold!, Wellesley, MA: A. K. Peters, 2006 p. 39.