anonymous
  • anonymous
law of sines pls help will become fan and give medal find the area of ABC. round your answer to the nearest tenth. m
Mathematics
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katieb
  • katieb
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anonymous
  • anonymous
a. 44.5 c. 49.4 b. 33.6 d. 77.1
jdoe0001
  • jdoe0001
hmm well. if you're using the "law of sines', that may not give you that much, since you only have one angle and its side is missing even if you were to find the side "b", how are you meant to get the area?
anonymous
  • anonymous
no idea thats just what the question asks

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jdoe0001
  • jdoe0001
well. have you covered the law of sines?
jdoe0001
  • jdoe0001
or have you covered the law of cosines? how about heron's formula?
anonymous
  • anonymous
no idea on any of that
anonymous
  • anonymous
i know the law of sines formula
anonymous
  • anonymous
i got c for this question is that right
jdoe0001
  • jdoe0001
how did you get "c", if you dunno any of the sections above?
anonymous
  • anonymous
49
anonymous
  • anonymous
i just said i know law of sines
jdoe0001
  • jdoe0001
anyhow, in this case what I'd use is the law of cosines, and then heron's formula but you haven't covered either, thus, you may want to do that firstly check your material for both, otherwise, I'd say the exercise doesn't apply to you
jdoe0001
  • jdoe0001
the law of sines alone in this case, is not help, because side "b" is missing
anonymous
  • anonymous
1/2 * (10.1*9.8 SINS 87) and i got 49
jdoe0001
  • jdoe0001
1/2 base * height, to get the area of a triangle, only applies to right-triangles this one doesn't come across to me to be one
jdoe0001
  • jdoe0001
well.. .I take that back 1/2 base * height does apply to all triangles BUT we dunno the triangles altitude, or height in this case, just its base
anonymous
  • anonymous
well i got 49 and thats an option so thats what im putting
anonymous
  • anonymous
i dont know how else to answer it
jdoe0001
  • jdoe0001
if it were a right-triangle, it'd simple to just grab either side and use it as altitude but angle B is 87 degrees, not 90
jdoe0001
  • jdoe0001
I myself, don't see how the law of sines alone would do it in this one I'd use the law of cosines to find "b", and use that in Heron's formula to get the area
anonymous
  • anonymous
the test is titled LAW OF SINES
anonymous
  • anonymous
then whats the law of cosines forumula
jdoe0001
  • jdoe0001
doesn't matter, you need to cover that first but surely your book would have it
anonymous
  • anonymous
im not in a book im taking an online test
anonymous
  • anonymous
can you just help me
anonymous
  • anonymous
thats why im here
jdoe0001
  • jdoe0001
well,, surely it has studying material, so you see, the issue is, if the material hasn't been covered, there's no sense in giving the exercise I've heard some folks say that, online classes and such, I don't see how that exempts them from studying now, it may be that the site is giving you something that hasn't been covered but if you haven't covered something, there's no sense in giving you the exercise

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