A, B, C and D are four towns. B is 30 kilometres due East of A.
C is 30 kilometres due North of A.
D is 45 kilometres due South of A.
a) Work out the bearing of B from C.
A.
B
b) Calculate the bearing of D from B.

The bearing of B from C is 90 degrees, and the bearing of D from B is 90 degrees

From the given parameters, we can deduce that the positions of locations B, C and D are directly on the vertical and horizontal axes with respect to point A.

See attachment for the diagram that illustrates the positioning of these points.

From these diagram, we can conclude that the bearing and the bearing of D from B is 90 degrees

Read more about bearing and distance at:

link

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.