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Section 4 Problem Solving and Design in Technology
2. Lightly extend parallel lines from each
corner of the box. Draw the depth lines
at 45°, or at a different angle such as 30°.
3. Lightly mark the extension lines at a
point equal to the depth of the object.
4. Lightly connect the depth lines to
form a box.
5. Add any details, such as holes, notches,
and grooves, onto the front view.
6. Extend the details the depth of the
object.
7. Complete the sketch by darkening in
the object and detail outlines.
The procedure listed above produces a cav-
alier oblique drawing. This type of drawing
causes the sides and top to look deeper than
they are. To compensate for this appearance,
designers often use cabinet oblique draw-
ings. See Figure 10-13. This type of drawing
shortens the lines projecting back from the
front to one-half their original lengths.
Isometric Sketches
Isometric sketches are the second type
of pictorial drawings used to produce
refined sketches. The word isometric means
“equal measure.” Isometric sketches get
their name from the fact that the angles that
the lines in the upper-right corner form are
equal. Each angle is 120°. Designers use iso-
metric sketching when the top, sides, and
front are equally important. The object is
shown as if it is viewed from one corner.
Figure 10-12. Designers create oblique sketches through a series of steps.
Step 1
Step 2
Step 4
Steps 6 and 7
Step 3
Step 5