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

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
by

1 Answer

Answer :

(A) 102
by

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