![]() ![]() ![]() (ii) Given the Bearings of the Lines in the Quadrantal System: The angle BAC can then be obtained by the application of the above rule. The bearing of AB is the back bearing of BA and is equal to bearing of BA☑80°. (b) When bearings of the two lines measured not from their point of intersection, are given.Įxpress both the bearings as if they are measured from the point where the lines intersect and then apply the above rule.įor example, if the bearings of the lines BA and AC are given, then to find angle at A, the bearings of AB must be obtained. Then obtain the interior angle by subtracting the difference from 360°. ![]() But if the difference exceeds 180°, It will be exterior angle. The difference will give the interior angle if it is less than 180°. Subtract the smaller bearing from the greater one. (a) When bearings of the two lines measured from their point of section are given. ![]()
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