parabolas
Sale Price:$200.00
Original Price:$600.00
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A parabola is the set of all points ( x, y) in a plane that are the same distance from a fixed line, called the directrix, and a fixed point (the focus) not on the directrix. The standard form of a parabola with vertex ( 0, 0) and the x -axis as its axis of symmetry can be used to graph the parabola. twilight 1
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