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

- anonymous

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- anonymous

@ash2326

- anonymous

use sin/cos

- anonymous

to find BA , then subtract that from 120

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## More answers

- anonymous

to find AG

- anonymous

use trig again to find GE

- anonymous

@ . @

- anonymous

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

- ash2326

@rebeccaskell94 did you understand?

- anonymous

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 :(

- ash2326

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

- anonymous

Doesn't tan(45) = 1?

- ash2326

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

- anonymous

Idk what to do with it now D:

- anonymous

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

- phi

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

- anonymous

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

- anonymous

ok, I am out

- phi

http://www.khanacademy.org/math/geometry/triangles/v/45-45-90-triangles
and
http://www.khanacademy.org/math/geometry/triangles/v/intro-to-30-60-90-triangles

- ash2326

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

- anonymous

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

- anonymous

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

- anonymous

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

- ash2326

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

- anonymous

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

- anonymous

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 :)

- anonymous

If you didn't notice, all it asked for was GE which you have as 62âˆš3 which you have :)

- anonymous

Oh wait, so are my âˆ†s right?

- anonymous

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 :)

- anonymous

Which one?

- anonymous

|dw:1343151807943:dw|

- anonymous

ohhhh okay

- anonymous

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

- anonymous

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

- anonymous

Thank you :D

- anonymous

np :)

- anonymous

good job , "becca"

- anonymous

lol why the quotation marks around my name D:

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