What is the way to find Directrix?

1 ANSWERS

1. Guest6162
   

   In geometry, the directrix is a line that characterizes a parabola. A second component utilized in the delineation of a parabola is a point interior the parabola called the focus. The expanse from any issue on a parabola to its aim is identical to the expanse from this issue to the directrix.
   Use these coefficients to find the equation of the directrix.
   • Write the equation of your parabola. For example, the equation might be (x- 12)^2 = 8 (y - 5).
   • Divide the coefficient in front of the parenthesis on the right edge of the equation by 4. In this demonstration, the outcome is 8/4 = 2.
   • Subtract the number got from the coefficient in the parenthesis on the right edge of the equation. In this demonstration, 5 - 2 = 3.
   • Use the number got as the worth of the variable y. In this demonstration, the directrix is a line formed by the set of all points with a y-value identical to three.

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