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Applied Geometry
LECTURE NOTES- MECE 104 Computer Aided Engineering Drawing
Chapter 4- Applied Geometry
(Notes from: Chapter 5 in Jensen,C., Helsel J.D., Short D. R., Engineering Drawing and Design, Mc Graw Hill,
7th Edition)7th Edition)
Spring Semester 2010/2011
Halil Orhan YILDIRAN, MS1
Applied Geometry
Geometry : Is the study of the size and shape of the objects
Some Geometric figures used in drafting are circles, squares,
triangles, hexagons, ellipses etc
2
DICTIONARY OF DRAFTING GEOMETRY
STRAIGHT LINE
(SHORTEST DISTANCE
BETWEEN TWO POINTS)
PARALLEL LINESPARALLEL LINES
INTERSECTING LINES
3
DICTIONARY OF DRAFTING GEOMETRY
RIGHT ANGLE ACUTE ANGLE OBTUSE ANGLE
COMPLEMENTARY ANGLE SUPPLEMENTARY ANGLE 4
DICTIONARY OF DRAFTING GEOMETRY
EQUILATERAL TRIANGLE
ALL SIDES EQUAL LENGTH
ISOSCELES TRIANGLE
TWO SIDES EQUAL LENGTH
RIGHT TRIANGLE SCALENE TRIANGLE5
DICTIONARY OF DRAFTING GEOMETRY
CIRCLES
CONCENTRIC ECCENTRIC6
DICTIONARY OF DRAFTING GEOMETRY
SQUARE RECTANGLE RHOMBUS
RHOMBOID TRAPEZOID TRAPEZIUM
7
DICTIONARY OF DRAFTING GEOMETRY
PENTAGON HEXAGON HEPTAGON OCTAGON
NONTAGON DECAGON DODECAGON
8
DICTIONARY OF DRAFTING GEOMETRY
CUBE RIGHT RIGHT RIGHTCUBE RIGHT
RECTANGLE
RIGHT
TRIANGULAR
PRISM
RIGHT
TRIANGULAR
PYRAMID
RIGHT
CYLINDER
RIGHT
CONE
FRUSTUM
OF A
CONE
SPHERE
9
BISECTING A LINE
10
BISECTING AN ARC
11
BISECTING AN ANGLE
12
DIVIDING A STRAIGTH LINE
13
DRAWING AN ARC TANGENT TO LINES
14
DRAWING AN ARC TANGENT TO LINES
15
Drawing perpendicular and parallel lines
DRAWING ARCS AND CIRCLES
16
DRAWING ARCS
Fig. 5-14 Drawing an arc tangent to two
circles
17
DRAWING A REGULAR PENTAGON
18
DRAWING AN HEXAGON
19
DRAWING AN ELLIPSE AND PARABOLA
20
DRAWING A HELIX
21
CAD APPLICATIONS
DRAWING A CIRCLE WITH 2 POINTS DRAWING A CIRCLE WITH 3 POINTS
22
CAD APPLICATIONS
CHAMFERS AND FILLETS
23
CAD APPLICATIONS
DRAWING POLYGONS
24
CAD APPLICATIONS
RECTANGLE (SUBMENUS)
DRAWING POLYGONS IN CATIA
25
CAD APPLICATIONS
FINDING THE MIDPOINT OF A LINE
26
CAD APPLICATIONS
FINDING THE MIDPOINT OF A LINE IN CATIA
27
CAD APPLICATIONS
POINT (SUBMENUS)
CREATING POINT IN THE MIDPOINT OF A LINE IN CATIA
28
POINT (SUBMENUS)
CAD APPLICATIONS
DRAWING ARCS29