## Desireegb 3 years ago At the bank of a river, by measurement, a = 18 ft. b = 30 ft. c = 24 ft. d = 14 ft. How long is x? How long is y? Angle --> https://media.glynlyon.com/a_matgeo_2011/5/group123.gif The answer should be to the nearest tenth or as a fraction. x = ? ft. y = ? ft.

1. sauravshakya

do u know that they are similar triangles

2. Desireegb

well, yes but im not sure how to set up the problem with the triangles... im pretty slow-minded when it comes to math..

3. godorovg

all similar triangles have angles that 180 degrees when added to together.

4. godorovg

now in the problem let's take this on triangle at time, let's start with first one

5. godorovg

let's do the first triangle, in the first triangle we a right angle which is 90 degrees, now given the info from the problem we can now solve this by thinking about sin, cos , tan here.

6. godorovg

hey you here or what??

7. godorovg

8. Desireegb

lol im sorry i was at an appt haha i just got back

9. godorovg

hey want some help??

10. Desireegb

yes lolz we seem to be missing each other lol

11. godorovg

12. Desireegb

lolz okay :P we finally caught up huh

13. godorovg

cheer cheer clap!! :)

14. Desireegb

so can u help me please? lol

15. godorovg

yes I can I want to know what you know already, this is so I don't repeat stuff that you can already.

16. godorovg

for this problem.

17. godorovg

this is trig right??

18. Desireegb

yes sorry my connection sucks so it takes forever to reply

19. godorovg

okay no prob. you have all you need to do this problem, notice on the choices give they refer to to the triangles listed on the picture so now what we have to is look at if we use sin,cos or tan in these cases to solve

20. Desireegb

so should i use the sine table for this problem?

21. godorovg

yes sin would be a good choice in this case.

22. Desireegb

k i have a chart... https://media.glynlyon.com/a_matgeo_2011/5/groupi94.gif

23. Desireegb

so should i look for the tan numbers for each other numbers given

24. godorovg

you can but in keep in mind what you are being asked for here.

25. godorovg

do the top first triangle only, than we will worry about the bottom within this problem

26. Desireegb

i forgot about the angle.. that kinda looks like c = a * b

27. godorovg

28. godorovg

the c=a times b is right

29. godorovg

did you get it?

30. Desireegb

i hate this computer -.- yes i got it thanks :)

31. godorovg

welcome any questions or are you fine now?

32. Desireegb

i think i got it for now lolz thanks a bunch :D

33. godorovg

great have a great night :)

34. Desireegb

u too