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|dw:1438394980022:dw|

this might look a lot better than what I drew ~

Is that all the information they give you?

yea ~ I put up the actual picture to make sure you see the clear model ~.

I get confused with this, when the shapes do not have all the info. sine and tan i get all confused

Ok, so we know that both triangles are similar

I would assume that 6/(x-9) = x/6

use sine rule

alright sine , but im always confused on which numbers or variables to use

summon SOHCAHTOA !

Sin = opp/hyp
Cos = adj/hyp
Tan = opp/adj

opposite and hypotenuse ~~~ alright

so we use the angle that is at A ?? it said shape ABC and find X and y

i just started this chapter, so its all new to me still

i started the stuff for ya by putting sin(90)/9

|dw:1438396237922:dw|

|dw:1438396318981:dw|

it can change depends on situation

well we have to find x and y , so whats the situation call for ?

wait lemme redraw your question to show it to you better

alright,

|dw:1438396632826:dw|

|dw:1438396694436:dw|

what type of triangle is this ?? 30 60 90 ?

idk but dont assume

alright ~

did you take both shapes from the original model for the question ?

yea i split them out

so you can see all the triangles

ohh alright ~

which one ??

if thats the case this is easy

but its not

which one ?? im confused

idk i just put in the numbers, the largest triangle isnt 45/45/90

oh so the one with the 6 ~

or the lonesome 6 i mean

you can try that

ok ? try what ?? the sine equation ?? on which numbers ?

i vaguely remember 45 45 90 ~

for 45/45/90 the its 6^2+6^2 = ??? (Pythagoras theorem)

24 ?? ~

8.4

wait I got it wrong or did you round it down ?? The ^ did the mean multiply or ?

\[\sqrt{6^2+6^2}=8.48528\]

ohhh ~ should have put that earlier, I thought you meant multiply

so the adjacent side is 8.4 ?

hypotenuse

for a 45/45/90 triangle, length of opposite=length of adjacent

i thought the hypotenuse was 6 already. ~ we are focusing on the smaller shape right??

Then its like this\[6^2 = 2a^2\]

|dw:1438398529080:dw| are we doing this shape ? you confused me soo much.

yea

you should get 4.24

but he hypotenuse is 6 already,

lol guess i look at the wrong stuff earler

ohh hahah ~ i do that to~

you see the placement of that lone 6 triangle, the adjacent + 9 is x

so x = 4.24+9

wait where did the 9 come from ?? the original one had only 6 the one I first posted

now you look at the big one

the original figure

ands its confusing me

\[6^2=2a^2\]\[36=2a^2\]\[18=a^2\]\[\sqrt{18}=a\]\[a=\sqrt{18}=4.2426\]

.... i have never seen 2a^2 ever mentioned in a problem

|dw:1438399124678:dw|you know pythagoras is \[a^2+b^2=c^2\]for a 45/45/90 triangle a=b

yea

13.2 ~ ?

yup

now use pythagoras to find y

ok then ~~ can you piece the equation together so i can try to work it out

\[c^2-a^2=b^2\]\[13.24^2-6^2=y^2\]

6 ?? i thought it was a 9 ??

|dw:1438399694247:dw|

|dw:1438399695601:dw|

so the opposite side of 6 is = ?

use the stuff i show you earlier

if you look at the big triangle you see the 6 is at the bottom

and the x is the whole line segment, since you split it up you would have to use the nine i thought.

you mean abc?? without the diagonal cutting it off in the middle ?

yea