cot ppt

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2. CLASSROOM RULES
• Ask questions.
• Respect and
listen to your
classmates.
• Respect and
listen to the
teacher.
• Raise your
hand to speak.
• Be prepared for
class.
• Be quiet when
the teacher is
talking.
• Be quiet when
classmates are
talking.
• Follow health
protocols.
• Share new
ideas.
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SET A SET B

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 A theory is a carefully thought-out explanation
for observations of the natural world that has
been constructed using the scientific method,
and which brings together many facts and
hypotheses. A principle, on the other hand, is a
basic truth, rule or law.

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7. 6.53
THEORIES AND
PRINCIPLES OF
ORTHOGRAPHIC
PROJECTION

8. OBJECTIVES:
1. Determine
the different
planes of
projection.
2. Create
orthographic
views through
a given figure.
3. Value the
importance of
knowing the
theories and
principles of
orthographic
projection.
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9. THEORIES AND PRINCIPLES OF
ORTHOGRAPHIC PROJECTION
Multi-view
drawing – a
drawing that
shows more
than one
view of an
object.
Orthograph
ic
Projection –
A system for
graphical
representatio
n of an object
by a line
drawing on a
flat surface.
Orthographic
View – a
drawing that
shows a side of
an object viewed
directly from 90
degrees.
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10. WHAT ARE THE PRINCIPAL VIEWS OF
ORTHOGRAPHIC DRAWING?

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13. PLANES OF
PROJECTION

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X
X
Y
Y
• FIRST ANGLE
• SECOND ANGLE
• THIRD ANGLE • FOURTH ANGLE

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•Three planes of projection are
used in orthographic drawing.
These are called the horizontal
plane, frontal plane, and the
profile plane.

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• FIRST QUADRANT

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Overall Size of the
Object
Height is the
perpendicular
distance between
two horizontal
planes.

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Width is the
perpendicular
distance
between two
profile planes.

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Depth is the
perpendicular
distance
between two
frontal planes.

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22. SUMMARY
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23. IS THERE ANY QUESTIONS?

24. ACTIVITY!

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TOP VIEW
FRONT VIEW SIDE VIEW

27. QUIZ!

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1. Although there are six principal views that
can be drawn in an object, how many
regular views are normally required in
the preparation of a working plan.
A. 6 B. 3 C. 4 D. 5

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2. A system for graphical representation of an
object by a line drawing on a flat surface.
A. Principal Views
B. Orthographic View
C. Orthographic Projection
D. Multi-View Drawing

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3. What do you call the 3 views of
drafting?
A. Front, Right Side, Top
C. Top, Rear, Left Side
B. Front, Left Side, Top
D. Front, Side, Rear

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Fill in the Blanks
4. The perpendicular distance
between horizontal planes is
referred to as ______________.

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Fill in the Blanks
5. The perpendicular distance
between profile planes is
called ______________.

33. GROWTH STRATEGY
ADDITIONAL
ACTIVITIES
• RULER
• PENCIL
• ERASER
• TAPE
• LONG BOND
PAPER -
WHAT HAVE
YOU LEARN?
DID IT
SOMEHOW
HELP YOU IN
YOUR DAY-TO-
DAY LIVING?
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34. 7/1/20XX

35. THANK YOU
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