For immune function, the following doses have been taken by mouth: 40 IU of vitamin D3 daily for 20 years to 100,000 IU of vitamin D3 bimonthly for 12 months, or 10,000 IU daily. For inflammatory bowel disease, 0.5 micrograms of alfacalcidol has been taken by mouth daily.
Intersecting lines. Two or more lines that meet at a point are called intersecting lines. That point would be on each of these lines. In Figure 1, lines l and m intersect at Q. Figure 1 Intersecting lines. Perpendicular lines. Two lines that intersect and form right angles are called perpendicular lines.
tangent - a straight line or plane that touches a curve or curved surface at a point but does not intersect it at that point. straight line - a line traced by a point traveling in a constant direction; a line of zero curvature; the shortest distance between two points is a straight line.