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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.42
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1992-07-02
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R0/0/639/199
text/8/3
It is unlikely you would make a 60 angle between any 2 bearings by
chance very often. But suppose you wanted to look over an unfamiliar
area. You could then MAKE your bearings and distances form an
equilateral triangle and be mathematically certain of returning to
your starting point. The same type of method can be used for any
triangle or rectangle, although the math becomes more complicated.
~
text/7/57
Therefore the following methods are used more in plotting a specific
area than in cross-country travel. For instance:
~
C343/3/3
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1
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2
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3
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You need to know the distance between points 1 and
3, but there is a small pond between them. To find
the answer you could measure the distance from 1 to
2 (2 being at a 90 bearing from 3) and then the
distance from 2 to 3. The distance from 3 to 1
would then complete a right triangle. A principle
of right triangles is that a + b = c . Therefore if
1 to 2 was 780' and 2 to 3 was 540';
~
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L32/97/23/99
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L16/108/23/112
L23/112/36/116
L36/116/42/119
L42/119/48/122
L48/122/57/119
L57/119/60/110
L60/110/62/98
L62/98/57/89
L57/89/52/83
L52/83/49/79
L49/79/38/80
L38/80/37/81
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L28/85/34/90
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L62/127/70/121
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a
~
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b
~
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text/33/155
608400' + 291600' = 900000' . C (3 to 1) is then the square root
of 900000 ----948.68' . *** An interesting use of right triangles
is to find the height of tall objects such as trees. To do this :
~