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Mathematics
Problem
Two observation posts A and B are 12 km apart. A third observation post C is located 15 km from A such that
C
B
A
^
\widehat{CBA}
C
B
A
is
67
∘
67^\circ
6
7
∘
. Find the measure of
C
A
B
^
\widehat{CAB}
C
A
B
.
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