The major axis 2a of the ellipse = 10 feet. (Given) The minor axis 2b of the ellipse = 6 feet (Given) Since 2a = 10 feet, implies a = 5 feet Also 2b = 6 feet, implies b = 3 feet To find the coordinate of the foci we have to use the following relationship: b² = a² - c² (3² = (5)² - c² c² = 25 - 9 c² = 16 c = ± 4 Therefore the foci are located at 4 feet on either side of the centre of the ellipse. Therefore the foci are 4 + 4 = 8 feet apart.
