Common Guidelines for Drawing Projections of Solid:

(a) If nothing is particularly about a solid it must be understood as being regular and right. For example, for a "cone", means a regular or right cone.

(b) Whenever an axis is perpendicular to one reference plane, so it is parallel to the other.

(c) Whenever an axis of the solid is perpendicular to a plane, so its base will be parallel to such plane.

(d) Projection of a solid on a plane to that its axis is perpendicular will demonstrate the true shape and size of its base.

(e) Whenever an axis is perpendicular to the HP, the top view must be drawn first and the front view must be protected from it.

(f) Whenever an axis is perpendicular to VP, the front view must be drawn first and the top view must be protected from it.

(g) If a solid has an edge of its base parallel to the HP or in HP, such edge must be maintained perpendicular to the VP. Whether the edge of the base is parallel to the VP or in the VP such edge must be maintained perpendicular to the HP.

 (h) If a solid has a corner of its base on the HP, the sides of the base having such corner must be kept equally inclined to the VP. If the corner of the base is in the VP, the sides of the base having that corner must be kept equally inclined to the HP.