English technology

2.  Sketch: is the first graphic approach to the
shape of an object and is created using only
a pencil, paper and rubber. Sometimes it can
include measurements.

3.  Plan is a type of technical representation. It
is usually made by rulers, compasses or
computers. A series of established rules must
be followed and the drawings can be made to
scale. It is always annotated

4.  Annotating a drawing means indicating all of
its real measurements so that it can be
interpreted.
 The annotation indicates the dimension lines,
the auxilary dimension lines, the dimensions
and the symbols.
 Annotating follows a series of rules and
criteria.

10.  Representing an object using views consists
of drawing it from various angles to make it
easier to understand.
 The main views are the:
 A) Front view:

11.  B) Overhead view
 C) Side view

13.  Observe that in the dimensions of the three
views:
- The front and side views are the same height
- The front and overhead views are the same
width
- The overhead and side views are the same
depth

16.  Most objects can not be represented in their
real dimensions.
 The solution to this problem is to
proportionally reduce or amplify all the
dimensions of the object with a scale.
 Scale= dimensions in the drawing
dimensions of the real object

17.  There are three types of scales:
A) Reduced scale. Ex 1:2 what in the drawing
measures 1 measures 2 in the real life
Scale 1/10

18. B) Actual scale 1:1

19.  C) Enlarged scale. Ex 2:1 what in the drawing
measures 2 measures 1 in the real life.