Question

define point of projection​

Answer 1

Projection of Points. A POINT. The position of a point in engineering drawing is defined with respect to its distance from the three principle planes i.e., with respect to the VP, HP, & PP. The point is assumed to be in the respective quadrant shown in figure 1(a).

Projection of a point onto a plane, Projection of a point onto a line. A given point A(x0, y0, z0) and its projection A′ determine a line of which the direction vector s coincides with the normal vector N of the projection plane P. x = x0 + a. t, y = y0 + b.

Answer 2

i think it is wrong but not understand