One of these shapes has an eccentricity of between zero and one, and has two foci, which lie on its major axis.
This shape is the special case of a hypotrochoid where the radius of the small circle is half the radius of the large circle. One of these shapes has an eccentricity of between zero and one, and has two foci, which lie on its major axis. Kepler's first law of planetary motion states that planetary orbits are in this shape. For 10 points, name this oval-shaped conic section.
This shape is the special case of a hypotrochoid where the radius of the small circle is half the radius of the large circle.
{ellipse} [do not accept " oval "]