The polyhedral having a plane figure for its base and an equal number of isosceles triangular faces meeting at a point i…

Axonometric drawing is a drawing like

T-square is used alone to draw:

The shape of scales are

picture plane is

Working drawing of a structure at site is prepared for the :

In a topographic drawing, the symbols representing natural features are drawn by freehand while artificial works are dra…

….… is used to protect the adjoining lines on the drawing when some parts of the line are being erased.