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|dw:1350739907443:dw|

U mean length of BC

yes, ABC is equilateral so any side...

4/sqrt(3) ?

Sorry, try again...

4 + 2/sqrt(3)

Um...no.

|dw:1350740356848:dw|

|dw:1350740418399:dw|

|dw:1350740461276:dw|

How u get 30?

Hint - make a transformation

i wasnt thinkin g sorry.. .let me think

U didn't like my hint?

No!

trying

U see what I mean? Now if you drop the perpendiculars from B and C, they will 5 and 4

dont post any more hints.. plz

|dw:1350742011463:dw|

4 sqrt 2

Nope, sorry.

I'm getting worried now, I better check my answer...
This is Pythagorus and some algebra, right?

im getting 3 quadratics wid 3 variables

|dw:1350743128666:dw|

I guess Now, using cosine rule and sine rule will give x and y.

|dw:1350743084775:dw|

is it 6.4291 ?

I have 2 sqrt 7

I think Sara was closest...

Where did I go wrong???

I will have a look later on.....

okay!

Thanx @shubhamsrg AND yes there was a mistake in cosine law.
Now, that gives the length 5.2915

Which looks correct.

Ah, u found it, good:-)