A circle in the isometric view appears as ___.

The ordinary photograph of an object is a ___.

The true shape of a section is a ___ when a cylinder is cut by a section plane inclined to the axis.

The first important step in making development of surfaces is to find the lines of ___.

In ___ quadrant, the point lies in front of V.P. and above H.P.

Roman lettering is used in ___ drawing.

The materials required for freehand sketching are ___.

Vernier scales are used in surveying and astronomical instruments for ___.