When the auxiliary plane is perpendicular to the principle of the projection, the view obtained is called ___ auxiliary …

The angle which is less than a right angle is called ___.

When a point lies on the reference line, its two views lie on ___.

The section obtained on a plane when the section plane is not parallel to the plane is called ___.

A cone curve which is generated by a point that moves in a constantly changing direction in space is called a ___ curve.

The pencil should be held by the thumb and first finger so that it rests on the second finger at about ___ from the penc…

___ method is used for developing spheres.

The horizontal lines are drawn from ___ to ___.