Reference Book
- Short break line
This line is drawn to indicate unequal borders
and a small break in a structure. - Long break line
This line is drawn to indicate a large break
in a structure. It is drawn with zig zag line
GEOMETRICAL DRAWING
INTRODUCTION
The drawing of object views involves plane geometric constructions. It is
necessary to have a good knowledge of plane geometry. Preparation of
engineering drawings involve number of geometrical constructions. Hence it
is necessary to study geometrical drawing. Geometrical constructions relating
to straight lines, circles, arcs of circles, Triangle, rectangle, square, regular
polygons and conic sections are illustrated in this chapter.
POINT
A point represents a location in space or on a drawing and generally represented
by a very small circle or a small dot.
LINE
A line is the shortest distance between two points.
Types of lines :
STRAIGHT LINE