1. A ________ is the intersection of a plane and a double-napped cone.
2. The equation (x − h)2 + (y − k)2 = r2 is the standard form of the equation of a ________ with center ________ and radius ________.
3. A ________ is the set of all points (x, y) in a plane that are equidistant from a fixed line, called the ________, and a fixed point, called the ________, not on the line.
4. The line that passes through the focus and the vertex of a parabola is the ________ of the parabola.
5. An ________ is the set of all points (x, y) in a plane, the sum of whose distances from two distinct fixed points, called ________, is constant.
6. The chord joining the vertices of an ellipse is the ________ ________, and its midpoint is the ________ of the ellipse.
7. A ________ is the set of all points (x, y) in a plane for which the absolute value of the difference of the distances from two distinct fixed points, called ________, is constant.
8. The line segment connecting the vertices of a hyperbola is the ________ ________, and its midpoint is the ________ of the hyperbola.