Use a piece of cardboard, two thumb tacks a piece of string 8 or 10" long, and a pencil to draw an clipsc as shown here. After the figure is drawn, locare a point on the cllipse and find the sum of the distanccs from that point to the thumb tacks. Then, choose four other points on the ellipse and find the sum of these dis- tances for each point. Stare a conclusion about