Assertion: parabola | /r/AtLocation | figure
Facets:
Source sentences:
text: A parabola, shown in Figure 1, below, is a special mathematical shape — a curve consisting of the points that are equidistant from both a given fixed point called the focal point or (focus) and a given fixed line (called the directrix).
text: A tangent can be drawn to a parabola from an external point as shown in the figure.
text: In the parabola shown in figure 2-8, point V, which lies halfway between the focus and the directrix, is called the vertex of the parabola.
text: Parabolas that are representative of the four cases given here are shown in figure 2-9.