The bearings of the lines AB and BC are 146 30' and 68 30'. The incl

1.

The bearings of the lines AB and BC are 146 30' and 68 30'. The included angle ABC is

A. 102

B. 78

C. 45

D. none of these.

Answer» B. 78

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The bearings of the lines AB and BC are 146 30' and 68 30'. The included angle ABC is

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1.	The bearings of the lines AB and BC are 146 30' and 68 30'. The included angle ABC is
A.	102
B.	78
C.	45
D.	none of these.
Answer» B. 78