The perpendicular line segment passing through P is then the projection of l2 onto l1 minus l2. 5. Use the line segment to define a line through point P.<BR><BR>If you want I can provide more detail, ...
To construct the tangent to a curve at a certain point A, you draw a line that follows the general direction of the curve at that point. An example of this can be seen below. Once the tangent is found ...