Construction and definitions The point E is an arbitrary point on the parabola. The focus is F, the vertex is A (the origin), and the line is the axis of symmetry. The line is parallel to the axis of symmetry, intersects the axis at D and intersects the directrix at C. The point B is the midpoint of the line segment .
Construction and definitions The point E is an arbitrary point on the parabola The focus is F, the vertex is A (the origin) and the line is the axis of symmetry. The line is parallel to the axis of symmetry, intersects the axis at D and intersects the directrix at C. The point B is the midpoint of the line segment 