👉 An ellipse, defined by two foci (foci that are not on the same line) and a major axis (the longest diameter of an ellipse), is a curve formed when a point moves along a straight line through the center of one focus to another. The distance from the center of the ellipse to either focus is called the semi-major axis, which is denoted by 'a', and the distance from any point on the ellipse to the other focus (or foci) is called the
