In orthographic projection, the line of sight is ___ to the plane of projection.

The sectional views are used to visualize the ___ details of the object.

Parallel ruling straight edge machines are used to draw _____:

The needle point of a compass should be _____ than the lead point:

The line connecting a view to a note is called a ___.

Dimension lines should not ___ each other.

The perspective of a circle is a circle when the plane is parallel to the other ___.

The art of representation of an object by systematic lines on paper is called: