Lesson 614 of 1524
Conics
Circle: A circle is all points in a plane that are a fixed distance from a fixed point in the plane.
Practice this chapterCircle: A circle is all points in a plane that are a fixed distance from a fixed point in the plane. The given point is called the center, ( h , k ) , and the fixed distance is called the radius, r, of the circle
Parabola: A parabola is all points in a plane that are the same distance from a fixed point and a fixed line. The fixed point is called the focus, and the fixed line is called the directrix of the parabola.
parabola — A parabola is all points in a plane that are the same distance from a fixed point and a fixed line. given point — called the center, ( h , k ) , and the fixed distance is called the radius, r, of the circle. circle — A circle is all points in a plane that are a fixed distance from a fixed point in the plane. fixed point — called the focus, and the fixed line is called the directrix of the parabola.
Worked example
What does “parabola” mean in Conics?
- 1Use the wording this chapter gives for parabola.
- 2The book says: A parabola is all points in a plane that are the same distance from a fixed point and a fixed line.
- 3Do not use the meaning of given point. That term means called the center, ( h , k ) , and the fixed distance is called the radius, r, of the circle.
Result: A parabola is all points in a plane that are the same distance from a fixed point and a fixed line
Why. That is the meaning this chapter gives for parabola.
Do not swap parabola and given point. parabola means A parabola is all points in a plane that are the same distance from a fixed point and a fixed line. given point means called the center, ( h , k ) , and the fixed distance is called the radius, r, of the circle.
Practice margin
This chapter
A fresh set from this chapter only. Choose 10 or 20. Multiple choice and fill-in, with no repeat inside the set.