Question

Need help! A, B, C and D are the four corners of a rectangular plot marked out on level ground. given that the bearing of B from A is 040 degree and the bearing of C from A is 090 degree, calculate the bearing of:
a. B from C
b. A from C
c. D from C

Answer 1

Giving the answer to your homework is too easy, try splitting up the square into triangles. If you know angle A then split it in half (getting 20) and then calculate the missing value at corner C, multiply it by 2 and you get the value for the entire C. Now you know 3/4 angles.

Answer 2

Answer:

A bearing is an angle measured from North direction clockwise.

In the image attached you can see a sketch of the given problem.

Notice that the bearing of B from C is 40°, because according to the problem, all four points are on level ground, which means they are coplanar, and the angle between the plane and the North is 40°.

The bearing of A from C is also 110°, because it's the bearing of C from A and A from C are same-side internal angles between parallels which must sum 180°.

The bearing of D from C is 40° too, because that setup is parallel to the bearing of B from C.