At what angle are section lines drawn relative to the horizontal line?

The line joining the projections of a point intersects the line xy at an angle of ___.

To represent a solid in orthographic projections, at least ___ view are necessary.

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

Projectors are drawn using ___ pencil and thin lines are used.

When the picture plane coincides with the object, the perspective of the object will be of its ___ size.

Two systems of placing dimensions on a drawing are ___ and ___.

The isometric length is about ___ of the true length.