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Mathematics 15 Online
OpenStudy (anonymous):

given a triangle with a = 19 degrees A=43 degrees and B=14 what is c?

OpenStudy (anonymous):

a = 19 degrees A=43 degrees B=14 c=? is the little a or the big A the angle?

OpenStudy (anonymous):

A, big sorry

OpenStudy (anonymous):

so like this then: a=19 A=43 degrees B=14 c=?

OpenStudy (anonymous):

so is a=19 A= 43 degrees B = 14 degrees c = ?

OpenStudy (anonymous):

so first thing we want to do is find what Angle C is using the concept that the sum of the interior angles = 180 degrees |dw:1384401733429:dw|

OpenStudy (anonymous):

so angle c would equal 123

OpenStudy (anonymous):

degrees

OpenStudy (anonymous):

yep. now use the 'law of sin' to figure out what the length of little c is |dw:1384401950607:dw|

OpenStudy (anonymous):

cool beans, so what do i do next? :O

OpenStudy (anonymous):

law of sin its this: \[\frac{ c }{ Sin(C) } = \frac{ b }{ Sin(B) }=\frac{ a }{ Sin(A) }\]

OpenStudy (anonymous):

pick either the b's or the a's, plug in the numbers then solve for c

OpenStudy (anonymous):

okay, but can you show me so i can have the full idea, please? :)

OpenStudy (anonymous):

\[\frac{ c }{ \sin(123) }=\frac{ 19 }{ \sin(43) }\]

OpenStudy (anonymous):

the answer would be 27.45 am i right? :D

OpenStudy (anonymous):

no im wrong nvm, keep going por favor? :D

OpenStudy (anonymous):

mmm... do your math again. you can get it ^_^

OpenStudy (anonymous):

omg i suck at this. okay so this is what i did 19 ------ = 27.85 sin (43)

OpenStudy (anonymous):

which makes no sense.

OpenStudy (anonymous):

|dw:1384402414229:dw|

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