In perspective projection, the ___ plane is placed between the object and the eye.

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

Three-point projection is an example of ___ projection.

The direction of the alphabet in upright Gothic lettering is ___.

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

In a half-sectional view, the object is assumed to be cut off ___.

Parabola and hyperbola are open curves of ___.

___ is the curve traced by a point moving continuously in one direction along a rotating line.