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World of Shareware - Software Farm 2
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GENERAL
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TNBA.ZIP
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THEORY.41
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1992-07-02
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text/23/3
Take, for instance, the following examples:
~
L89/25/89/95
L9/55/181/55
L95/52/130/40
L148/35/179/25
L182/27/194/44
L198/51/208/66
text/84/16
N
~
text/73/45
1
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text/183/15
2
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text/199/68
3
~
text/237/18
From your starting point (1), you travel at
a bearing of 45 for 1320' to point 2. Then
at 165 for 1320' to point 3. What bearing
and distance do you travel to return to 1 ?
Note that the angle between the 2
bearings traveled so far is 60 (if you were
traveling straight south-180- the angle
formed would be 45, since you are traveling
15 more east-165-the angle formed is
~
text/14/100
increased by 15). The 2 "legs" are of equal length. Therefore if
you form another 60 angle between the leg from 2 to 3 and the leg
from 3 to 1, you will be completing an equilateral triangle (3
equal sides and 3 - 60 angles). Perhaps the easiest way to
determine the bearing is to "look back" and determine that the
bearing from 3 to 2 is 15 less than 360 (north), 345 . To form a 60
angle with this line you would then travel at a bearing of 285
(345-60) for 1320' to return to point 1. Although this explanation
is quite involved, the actual process is relatively easy.
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