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I don't have the formula you need for this... do you have it nearby? :)
I think it is b but i'm not sure
Here's some help for these... http://www.teacherschoice.com.au/maths_library/trigonometry/solve_trig_sss.htm http://www.ajdesigner.com/phptriangle/isosceles_triangle_area_k.php
It's the cosine and sine rules... but I barely remember them... had to look them up, so it probably makes sense for you to read the examples shown.
It is def not b cuz I got for angle G=55
I would say its D
sorry, distracted ;) Lemme try to solve it again...
But like do u know how to use the equation? Like I bet you gotta show ur work
That first link I posted earlier actually walks you through, step by step, how to do a problem like this. Rather than repost it all here, you might read through those steps... you should be able to set your problem up in the same way, one step at a time.