krissywatts 3 years ago i need help solving line ef to get a bearing reading for EF?

1. krissywatts

|dw:1349625787746:dw|

2. krissywatts

i also need help with this one too.

3. krissywatts

I need help solving for GH to get a bearing reading for GH?

4. krissywatts

|dw:1349626044094:dw|

5. phi

why don't you add 40 degrees to S 60 W to get S 100 W that does not look standard, I would say bearing 280 degrees or maybe N 80 W ?

6. krissywatts

|dw:1349646083782:dw|

7. phi

The rightmost column is cut off

8. phi

But azimuth starts with 0 degrees means North, 90 means East, 180 South and 270 is West A is easy. Can you try?

9. krissywatts

first one is east, second one os west, and third one iseast as well

10. krissywatts

if i try this can you see if i'm correct

11. krissywatts

for the first one i got 159.83 for azimuth?

12. krissywatts

for c i got 349.5, and for e. i got 139.83?

13. krissywatts

for B and D idk what to do?

14. phi

for A. N. 20 DEG. 10 SEC. E that means start at North and turn 20 degrees 10 secs towards the east. That is exactly how azimuth goes. Can you try again for A?

15. phi

C N 10 DEG. 30 SEC. W. Are you sure about 30 seconds? It goes Degrees, Minutes, Seconds 60 seconds in a minute, and 60 minutes in a degree (that means 1 second is 1/3600 degree, which is a very tiny angle)

16. krissywatts

for a did you get 69.83?

17. phi

If it were N 10 deg, 30 min W then your answer c i got 349.5, would be correct. but if it is 30 seconds, no

18. phi

The azimuth for A is just 10 deg 10 seconds or 10.00278 degrees

19. krissywatts

okay, and how do i do the others up top? cause it looks different

20. phi

which one?

21. krissywatts

the first two up top with a graph because they just have degrees with no seconds

22. phi

The first one shows S 60 W that means start at South and turn 60 degrees toward West. Can you change that to azimuth (0 to 360 degrees)? Remember South is 180 degrees and as you turn toward West (at 270) the angle gets bigger.

23. krissywatts

and yes for c it is N. 30 degrees and 10 seconds?

24. krissywatts

and i still don't know what B and D are?

25. phi

I don't want to confuse you. Let's first answer one question The very first one. It says S 60 W and then turn another 40 degrees. S 60 W is the same as 180+60= 240 add another 40 degrees: 240+40= 280 so the answer is 280 degrees or N 80 W

26. phi

Can you answer the 2nd question N 58 E and then turn another 53 degrees ?

27. phi

You never answered, are you sure it says seconds ?

28. krissywatts

yes

29. krissywatts

sorry i was busy

30. krissywatts

the second graphed equation i got 95 is that correct?

31. phi

How ?

32. krissywatts

90-53=37, 37+58=95

33. phi

why are you doing 90-53? look at this picture |dw:1349650416701:dw|

34. krissywatts

53 degrees sit under 58 degrres and your missing it in the graph

35. phi

N 58 E is 58 degrees from North. Now add 53 more degrees to get to H. If they want azimuth, it would be 58+53= 111 degrees Notice that this is S (180) then 69 degrees towards East or S 69 E

36. krissywatts

|dw:1349650772940:dw|

37. krissywatts

okay, amd for tese two i need help. i get 15 degrees for the first one and for the second one i get 105 degrees is this correct?

38. phi

For the picture on the left, what is the angle? Are you supposed to find B?

39. krissywatts

15 degrees?

40. phi

I don't understand what the question is for these pictures. Find what?

41. krissywatts

it says solve the following then it just says bearing of AB and it say the same for CD

42. phi

to find AB, we need to know the angle between N 75 W and B. Did they give it?

43. krissywatts

yeah 90 degrees

44. phi

OK then N 75 W + 75 gets you to North (0 deg). we still have 15 more degrees. So the answer is either 15 degrees azimuth or N 15 E ( I am not sure which format they want) what is the angle between S 40 E and CD in the right picture?

45. krissywatts

for CD i got 105 degrees?

46. phi

I can't help unless I know the angle between S 40 E and CD

47. krissywatts

the angle for that is 75 degrees

48. phi

|dw:1349651615722:dw|

49. phi

It is not 105. Azimuth is more than 180 (South is 180)

50. krissywatts

|dw:1349651719097:dw|

51. krissywatts

i got 105?

52. phi

If you are at S40E and turn 40 degrees to the South which way are you pointing?

53. krissywatts

counter clockwise

54. phi

If you are at S40E and turn 40 degrees to the South which way are you pointing? You are at 180 degrees or South. now keep going another 35 degrees

55. krissywatts

215?

56. phi

Yes, or S 35 W notice that S 35 W was easy to find: You start at S and go 35 W so S 35 W

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