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Mathematics 9 Online
OpenStudy (anonymous):

PLEASE HELPP ME !!! What is the length of side x in the triangle below? picture is below

OpenStudy (anonymous):

|dw:1398118596929:dw|

OpenStudy (anonymous):

use the law of sin

OpenStudy (anonymous):

i dont know how to use it

OpenStudy (anonymous):

\[\frac{ x }{ \sin(\angle) } = \frac{ 8 }{ \sin(\angle) }\]

OpenStudy (anonymous):

thats the equation so far, can you find the value of the angle that is 'across' from the side that has the length of 8?

OpenStudy (anonymous):

30-60-90

OpenStudy (anonymous):

@DemolisionWolf

OpenStudy (anonymous):

yes, those are the interior angles of the triangle that add up to 180, i'm looking for, what is the value of the angle across from this side? |dw:1398119069194:dw|

OpenStudy (anonymous):

so wouldnt i use a2=b2+c2

OpenStudy (anonymous):

the angle 'across' from side 8 is 60 |dw:1398119190412:dw| do u see how it is 'across'? \[\frac{ 8 }{ \sin(60) } = \frac{ x }{ \sin(\angle) }\] now, can you use the same method i just used to find the 'across' angle value, but now do it for side x?

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