A plane flies from Auckland (A) to Gisborne (G) on a bearing of 115 angle. The plane then flies on to Wellington (W). Angle AGW=63.
(a) Calculate the bearing of Wellington from Gisborne.
(b) The distance from Wellington to Gisborne is 400 kilometres.
The distance from Auckland to Wellington is 410 kilometres.
Calculate the bearing of Wellington from Auckland.

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

answer: no

step-by-step explanation: because the big angle will spread away the 2 side that it is on and make the opposite side even longer.