## rebeccaskell94 3 years ago In the figure below, the length of line segment CB is 58 units and the length of line segment BG is 120 units. What is the length of line segment GE? http://learn.flvs.net/webdav/assessment_images/educator_geometry_v14/pool_Geom_3641_0404_07/image0084e2ee688.gif Does anyone know a formula I would use to solve this

@ash2326

2. 91

use sin/cos

3. 91

to find BA , then subtract that from 120

4. 91

to find AG

5. 91

use trig again to find GE

@ . @

7. mukushla

1......find AB using tan 45 in triangle ABC 2......find AG using AG=120-AB 3......find GE using tan 60 in triangle AGE o.O

8. ash2326

Idunnow is mukushala and 91's ways good? how do you do sin/cos anyway D: urg I'm so confused. My brain is not a math brain :(

10. ash2326

I triangle CBA, what's tan 45? @rebeccaskell94

Doesn't tan(45) = 1?

12. ash2326

yeah, you;re right but it's also perpendicular/ adjacent, isn't it?

Idk what to do with it now D:

14. Calcmathlete

Remember how the legs of a 45-45-90 triangle are the same length? Can you find AG knowing that?

15. phi

Are you studying trig? these are 45-45-90 triangle and 30-60-90 triangle

ummm can we have like, 1 person helping me xD too many is making it worse. It takes a while to help me bc my brain...it doesn't get along well with math

17. 91

ok, I am out

18. phi
19. ash2326

I'll let others help here :P I'll observe silently :)

But ashy!! D: I wanted you to help me xD

21. Calcmathlete

|dw:1343150968050:dw| If x = 58, can you figure the rest out?

22. Calcmathlete

I just used the ratio for a 45-45-90 triangle and 30-60-90 triangle.

23. ash2326

@rebeccaskell94 @Calcmathlete is a great helper, I'm sure you'll understand .

Okay I has this XD|dw:1343151162714:dw|

25. Calcmathlete

Oh. You misread that part for AG....it said 120 - x. When I said to figure out the rest, I meant did you understand how to get the answer now using the ratios, but it's good practice XD Good job by the way :)

26. Calcmathlete

If you didn't notice, all it asked for was GE which you have as 62√3 which you have :)

Oh wait, so are my ∆s right?

28. Calcmathlete

Yup :) Good work! That one part on the bottom of the 30-60-90 triangle is wrong because you misread it, but as long as you understand the concept, it's fine :)

Which one?

30. Calcmathlete

|dw:1343151807943:dw|

ohhhh okay

32. Calcmathlete

Yeah. I think you read it as 20 - x when it's 120 - x.

33. Calcmathlete

Good job though. 45-45-90 and 30-60-90 triangles can be very simple once you remember the ratios! :D

Thank you :D

35. Calcmathlete

np :)

36. 91

good job , "becca"