The plane which is inclined to V.P. and perpendicular to H.P. is known as ___.

An edge is represented by a ___ in all three views.

For A1 size sheets, how many zones are suggested by ISI along the length and width?

Parabola and hyperbola are open curves of ___.

The section planes are represented by its ___ on H.P. and V.P.

In the sectional view, the part of the object between the cutting plane and ___ is assumed to be removed.

The inclination between two perpendicular lines is called ___.

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