January 2014
Intermediate to advanced
144 pages
4h 2m
English
Content preview from Mathematical Formulas for Industrial and Mechanical Engineering
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1.5 Geometry Symbols
Symbols How to Read It How to Use It Examples
+ angle formed by two rays +ABC 5 30
, measured angle ,ABC 5 30
- spherical angle -AOB 5 30
∟ right angle 5 90
α 5 90
degree 1 turn 5 360
α 5 60
0
arcminute 1
5 60
0
α 5 60
59
0
v arcsecond 1
0
5 60v α 5 60
59
0
59v
!
AB
line infinite line
AB line segment line from point A to point B
!
AB
ray line that start from point A
AB
_
arc arc from point A to point B
j perpendicular perpendicular lines (90
angle) ACjBC
jj parallel parallel lines ABjjCD
D congruent to equivalence of geometric shapes
and size
ΔABCDΔXYZ
B similarity same shapes, not same size ΔABCBΔXYZ
Δ triangle triangle shape ΔABCDΔBCD
jx
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