How To Count & say the numbers in Cherokee. Check out this instructional language video to learn how to speak Cherokee! In this lesson, learn how to count the numbers one through twenty. This tutorial is great for beginners who want to improve their Cherokee language skills. Practice your Cherokee by learning the numbers and how to count! Check out this instructional language video to learn how to speak Cherokee! In this lesson, learn how to count the numbers one through twenty.
Directrix of a Parabola. A line perpendicular to the axis of symmetry used in the definition of a parabola. A parabola is defined as follows: For a given point, called the focus, and a given line not through the focus, called the directrix, a parabola is the locus of points such that the distance to the focus equals the distance to the directrix.
Meanwhile this might help. The directrix of a conic section is the line which, together with the point known as the focus, serves to define a conic section as the locus of points whose distance from the focus is proportional to the horizontal distance from the directrix, with r being the constant of proportionality.